If a triangle ha a 22° angle and a 46° angle, what can be etablihed about the third angle meaure and the type of triangle?

Answers

Answer 1

The third angle measure is 112°, and the triangle is an obtuse triangle.

A triangle has 3 angles, and the sum of all angles inside a triangle is 180°.

So, 22 + 46 + x = 180

x = 112°

Since the triangle contains an angle measure greater than 90° (the 46° angle), it is an obtuse triangle.

An obtuse triangle is a triangle with one angle measure greater than 90°. In this triangle, the angle measure of 46° is the obtuse angle, and the other two (22° and 112°) are acute angles. Obtuse triangles are often used in construction and engineering applications because of their stability. The third angle measure is 112°, and the triangle is an obtuse triangle.

Learn more about triangle here

https://brainly.com/question/2773823

#SPJ4


Related Questions

onsider the curve given by the parametric equations x=t(t2−192),y=3(t2−192) x=t(t2−192),y=3(t2−192) a.) determine the point on the curve where the tangent is horizontal.

Answers

To find the point on the curve where the tangent is horizontal, we need to find the value(s) of t for which the derivative of y with respect to x (i.e., dy/dx) is equal to zero.

First, we can find the derivative of y with respect to x using the chain rule:

dy/dx = (dy/dt) / (dx/dt)

We have

dx/dt = 3t^2 - 192

dy/dt = 6t

Therefore:

dy/dx = (dy/dt) / (dx/dt) = (6t) / (3t^2 - 192)

To find the values of t where dy/dx = 0, we need to solve the equation:

6t / (3t^2 - 192) = 0

This equation is satisfied when the numerator is equal to zero, which occurs when t = 0.

To confirm that the tangent is horizontal at t = 0, we can check the second derivative:

d^2y/dx^2 = d/dx (dy/dt) / (dx/dt)

         = [d/dt ((6t) / (3t^2 - 192)) / (dx/dt)] / (dx/dt)

         = (6(3t^2 - 192) - 12t^2) / (3t^2 - 192)^2

         = -36 / 36864

         = -1/1024

Since the second derivative is negative, the curve is concave down at t = 0. Therefore, the point on the curve where the tangent is horizontal is (x,y) = (0, -576).

To know more about parametric equations refer here

https://brainly.com/question/29168942

SPJ11

Assume the following waves are propagating in air.Part A.Calculate the wavelength λ1λ1lambda_1 for gamma rays of frequency f1f1f_1 = 5.50×1021 HzHz .Express your answer in meters.

Answers

The wavelength λ1 for gamma rays of frequency f1 = 5.50×1021 Hz is 5.45 × 10-14 m.

To calculate the wavelength λ1 for gamma rays of frequency f1 = 5.50×1021 Hz, we can use the formula:
λ1 = c/f1

where c is the speed of light in a vacuum, which is approximately 3.00 × 108 m/s.
Substituting the values given, we get:

λ1 = 3.00 × 108 m/s / 5.50 × 1021 Hz
λ1 = 5.45 × 10-14 m

Therefore, the wavelength λ1 for gamma rays of frequency f1 = 5.50×1021 Hz is 5.45 × 10-14 m.

Know more about the wavelength here:

https://brainly.com/question/10750459

#SPJ11

Use the given degree of confidence and sample data to construct a confidence interval for the population mean. Assume that the population has a normal distribution.



The football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were: 7. 2, 10. 5, 9. 9, 8. 2, 11. 0, 7. 3, 6. 7, 11. 0, 10. 8, 12. 4



Determine a 95% confidence interval for the mean time for all players

Answers

The 95% confidence interval for the mean time for all players is given as follows:

(8.1, 10.9).

What is a t-distribution confidence interval?

The t-distribution is used when the standard deviation for the population is not known, and the bounds of the confidence interval are given according to the equation presented as follows:

[tex]\overline{x} \pm t\frac{s}{\sqrt{n}}[/tex]

The variables of the equation are listed as follows:

[tex]\overline{x}[/tex] is the sample mean.t is the critical value.n is the sample size.s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed 95% confidence interval, with 10 - 1 = 9 df, is t = 2.2622.

The parameters are given as follows:

[tex]\overline{x} = 9.5, n = 10, s = 1.98[/tex]

The lower bound of the interval is given as follows:

[tex]9.5 - 2.2622 \times \frac{1.98}{\sqrt{10}} = 8.1[/tex]

The upper bound is given as follows:

[tex]9.5 + 2.2622 \times \frac{1.98}{\sqrt{10}} = 10.9[/tex]

More can be learned about the t-distribution at https://brainly.com/question/17469144

#SPJ4

Type this number using words. 965,406,000,351,682. 62​

Answers

Answer:

nine hundred sixty-five trillion four hundred six billion three hundred fifty-one thousand six hundred eighty-two and sixty-two hundredths

Hope that helps! :)))

the proportion of college students who are awarded academic scholarships is claimed to be 0.12. believing this claimed value is incorrect, a researcher surveys a large random sample of college students and finds the proportion who were awarded academic scholarships to be 0.08. when a hypothesis test is conducted at a significance (or alpha) level of 0.05, the p-value is found to be 0.03. what decision should the researcher make based on the results of the hypothesis test? group of answer choices the null hypothesis should be rejected because 0.03 is less than 0.05. the null hypothesis should be rejected because 0.08 is less than 0.12. the null hypothesis should be rejected because 0.03 is less than 0.12. the null hypothesis should not be rejected. the null hypothesis should be rejected because 0.05 is less than 0.08.

Answers

The researcher should conclude that the claimed value of 0.12 is incorrect based on the sample data.

The appropriate decision based on the results of the hypothesis test is that the null hypothesis should be rejected because 0.03 is less than 0.05.

In hypothesis testing, the null hypothesis is typically a statement that there is no difference between the sample and the population parameter. In this case, the null hypothesis would be that the proportion of college students who are awarded academic scholarships is 0.12, as claimed. The alternative hypothesis would be that the proportion is different from 0.12.

The p-value is the probability of obtaining a sample proportion as extreme or more extreme than the one observed, assuming that the null hypothesis is true. A p-value of 0.03 means that there is a 3% chance of observing a sample proportion as extreme or more extreme than 0.08, assuming that the true population proportion is 0.12.

Since the p-value is less than the significance level of 0.05, we reject the null hypothesis and conclude that the proportion of college students who are awarded academic scholarships is significantly different from 0.12.

Learn more about null hypothesis at: brainly.com/question/28098932

#SPJ11

A girl pulls a 10-kg wagon with a constant force of 30 N. What is the acceleration of the wagon in m/s^2? a. 30 b. 0.3 c. 3 d. 10

Answers

The acceleration of the wagon can be calculated using the formula: a = F/m. In this case, the force applied is 30 N and the mass of the wagon is 10 kg, so the acceleration is 3 m/s^2. The correct option is c.

To find the acceleration of the wagon, we use the formula a = F/m, where F is the force applied and m is the mass of the wagon. In this case, the force applied is 30 N and the mass of the wagon is 10 kg, so the acceleration can be calculated as follows:

a = F/m = 30 N / 10 kg = 3 m/s^2

Therefore, the acceleration of the wagon is 3 m/s^2. This means that for every second that passes, the speed of the wagon will increase by 3 meters per second. It is important to note that this acceleration is constant, meaning that the wagon will continue to increase its speed by 3 m/s^2 until the force is removed or another force is applied.

Learn more about acceleration here:

https://brainly.com/question/30660316

#SPJ11

Find the positive numbers whose product is 100 and whose sum is the smallest possible. (list the smallest number first).

Answers

the sum x + y is at least 20. We can achieve this lower bound by choosing x = y = 10, since then xy = 100 and x + y = 20. This is the smallest possible value of the sum, so the two positive numbers are 10 and 10.

Let x and y be the two positive numbers whose product is 100, so xy = 100. We want to find the smallest possible value of x + y.

Using the AM-GM inequality, we have:

x + y ≥ 2√(xy) = 2√100 = 20

what is numbers?

Numbers are mathematical objects used to represent quantity, value, or measurement. There are different types of numbers, including natural numbers (1, 2, 3, ...), integers (..., -3, -2, -1, 0, 1, 2, 3, ...), rational numbers (numbers that can be expressed as a ratio of two integers), real numbers (numbers that can be represented on a number line), and complex numbers (numbers that include a real part and an imaginary part).

To learn more about number visit:

brainly.com/question/17429689

#SPJ11

A 0.10 KG BIRD IS FLYING AT A CONSTANT SPEED OF 9.0 M/S. WHAT IS THE KENETIC ENERGY

Answers

Therefore, the kinetic energy of the bird is 4.05 J.

The kinetic energy of a 0.10 kg bird that is flying at a constant speed of 9.0 m/s is 4.05 J.

Kinetic energy (KE) is the energy possessed by a moving object.

It is the energy required to bring an object of mass m moving at a velocity v to rest.

Kinetic energy (KE) is represented by the formula

KE = 1/2mv².KE = 1/2 x m x v²

Given: mass (m) = 0.10 kg

velocity (v) = 9.0 m/s

KE = 1/2 x m x v²

KE = 1/2 x 0.10 kg x (9.0 m/s)²

KE = 1/2 x 0.10 kg x 81 m²/s²KE = 4.05 J  

To know more about kinetic visit

https://brainly.com/question/999862

#SPJ11

Given: (x is number of items) Demand function: d(2) 862.4 – 0.6x2 Supply function: s(x) = 0.5x2 Find the equilibrium quantity: Find the producers surplus at the equilibrium quantity

Answers

The producer surplus at the equilibrium quantity is 5488/3 or approximately 1829.33.

The equilibrium quantity is found by setting the demand equal to the supply:

862.4 - 0.6x² = 0.5x²

Simplifying and solving for x, we get:

1.1x² = 862.4

x² = 784

x = 28

So the equilibrium quantity is 28.

The producer surplus at the equilibrium quantity, we first need to find the equilibrium price.

The demand or supply function to do this and since the supply function is simpler, we'll use that:

s(28) = 0.5(28)²

= 196

So the equilibrium price is 196.

The producer surplus at the equilibrium quantity is the area above the supply curve and below the equilibrium price, up to the quantity of 28. The supply curve is a quadratic function can find this area using integration:

∫[0,28] (196 - 0.5x²) dx

= [196x - (0.5/3)x³] from 0 to 28

= (5488/3)

= 1829.33.

For similar questions on equilibrium quantity

https://brainly.com/question/28945352

#SPJ11

The​ P-value for a hypothesis test is 0.081. For each of the following significance​ levels, decide whether the null hypothesis should be rejected.
a. alph-0.10 b. alpha=0.05
a. Determine whether the null hypothesis should be rejected for alphaequals0.10.
A. Reject the null hypothesis because the​ P-value is greater than the significance level.
B. Do not reject the null hypothesis because the​ P-value is greater than the significance level.
C. Do not reject the null hypothesis because the​ P-value is equal to or less than the significance level.
D. Reject the null hypothesis because the​ P-value is equal to or less than the significance level.
b. Determine whether the null hypothesis should be rejected for alphaequals0.05.
A. Reject the null hypothesis because the​ P-value is equal to or less than the significance level.
B. Reject the null hypothesis because the​ P-value is greater than the significance level.
C. Do not reject the null hypothesis because the​ P-value is greater than the significance level.
D. Do not reject the null hypothesis because the​ P-value is equal to or less than the significance level.

Answers

The decision to reject or not reject the null hypothesis depends on the chosen significance level. The smaller the significance level, the stronger the evidence needed to reject the null hypothesis.

In hypothesis testing, the significance level is the probability of rejecting the null hypothesis when it is true. It is usually set at 0.05 or 0.01. The P-value is the probability of obtaining a test statistic as extreme as the one observed, assuming the null hypothesis is true.

For a P-value of 0.081, we can say that there is some evidence against the null hypothesis but not strong enough to reject it.

If the significance level is set at 0.05, we should not reject the null hypothesis because the P-value is greater than the significance level.

However, if the significance level is set at 0.10, we may choose to reject the null hypothesis because the P-value is equal to or less than the significance level.
To learn more about : reject

https://brainly.com/question/29734427

#SPJ11

For part a, since the alpha level is 0.10, the null hypothesis should be rejected if the P-value is less than or equal to 0.10. Since the P-value is 0.081, which is greater than 0.10, we do not reject the null hypothesis. Therefore, the answer is B.

For part b, since the alpha level is 0.05, the null hypothesis should be rejected if the P-value is less than or equal to 0.05. Since the P-value is 0.081, which is greater than 0.05, we do not reject the null hypothesis. Therefore, the answer is C. In hypothesis testing, the null hypothesis is a statement that assumes there is no significant difference between the sample data and the population data. The hypothesis test is used to determine the validity of the null hypothesis by calculating the probability of observing the sample data if the null hypothesis is true. The significance level is the threshold value used to determine whether to reject the null hypothesis. It is usually set to 0.05 or 0.01. The P-value is the probability of obtaining a test statistic as extreme as or more extreme than the one observed, assuming the null hypothesis is true. If the P-value is less than or equal to the significance level, we reject the null hypothesis. Otherwise, we do not reject it.

Learn more about hypothesis testing here :Brainly.com/question/31958776

#SPJ11

Consider the initial value problem for the function y y′−3y1/2=0,y(0)=0,t⩾0. (a) Find a constant y1 solution of the initial value problem above. y1=? (b) Find an implicit expression for all nonzero solutions yy of the differential equation above, in the form ψ(t,y)=c, where cc collects all integration constants. ψ(t,y)=? (c) Find the explicit expression for a nonzero solution y of the initial value problem above y(t)=?

Answers

(a) To find a constant solution, we set y' = 0 in the differential equation. Substituting this into the equation, we have y(0) - 3y^(1/2) = 0. Since y(0) = 0, we have 0 - 3y^(1/2) = 0, which gives y^(1/2) = 0. Thus, y = 0.

(b) To find an implicit expression for all nonzero solutions, we rearrange the differential equation as y' = 3y^(1/2)/y. Separating variables, we have y^(-1/2) dy = 3 dt. Integrating both sides, we get ∫y^(-1/2) dy = ∫3 dt, which gives 2y^(1/2) = 3t + c, where c is the integration constant.

(c) To find the explicit expression for a nonzero solution, we solve for y. Taking the square of both sides of the implicit expression, we have 4y = (3t + c)^2. Simplifying, we get y = (3t + c)^2/4.

Therefore, the explicit expression for a nonzero solution of the initial value problem is y(t) = (3t + c)^2/4, where c is an arbitrary constant. This represents a family of parabolic curves.

Learn more about variables here: brainly.com/question/32386527

#SPJ11

Work out lengths of sides A and B. Give answers in 1 decimal place

Answers

In the triangles, the value of a and b are,

⇒ a = 9.4

⇒ b = 12.1

Since, The Pythagoras theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the square of the other two sides.

WE have to given that;

There are two triangles are shown.

Now, In first triangle,

Base = 5 cm

Perpendicular = 8 cm

Hence, By using Pythagoras theorem we get;

⇒ a² = 8² + 5²

⇒ a² = 64 + 25

⇒ a² = 89

⇒ a  = √89

⇒ a = 9.4

In second triangle,

Hypotenuse = 17 cm

Base = 12 cm

Hence, By using Pythagoras theorem we get;

⇒ 17² = 12² + b²

⇒ 289 = 144 + b²

⇒ b² = 289 - 144

⇒ b  = √145

⇒ b = 12.1

Learn more about the Pythagoras theorem visit:

https://brainly.com/question/343682

#SPJ1

An 10-sided number cube is rolled 5000 times. The number 2 appeared 520 times.

Determine the theoretical and experimental probability of rolling a 2 in order to determine the fairness of the number cube.

Drag values or words to the boxes to correctly complete the statements.

The theoretical probability of rolling a 2 is (Response area AA.) The experimental probability of rolling a 2 is (Response area B.) Examining these values, you should conclude that the cube is likely (Response area C.)

Answers that can be submitted: 0.05, 0.1, 0.104, 0.208, fair, unfair

Answers

Based on this facts, we may conclude that the cube is most likely fair because the experimental probability is quite close to the theoretical probability.

The theoretical chance of rolling a 2 may be estimated by dividing the number of potential outcomes by the number of ways to roll a 2.

Since the number cube has 10 sides,

The total number of possible outcomes is 10.

Therefore,

The theoretical probability of rolling a 2 is 1/10 or 0.1.

The experimental probability of rolling a 2 may be estimated by dividing the total number of rolls by the number of times a 2 was rolled.

In this case,

The number 2 appeared 520 times out of 5000 rolls.

Therefore,

The experimental probability of rolling a 2 is 520/5000 or 0.104.

Learn more about the probability visit:

https://brainly.com/question/13604758

#SPJ1

The measures of the angles of a triangle are shown in the figure below. Solve for x.

Answers

The value of x is 13

How to determine the value

To determine the value of the variable, we need to know the properties of a triangle;

These properties are;

A triangle is a polygonIt has three sidesIt has three anglesThe sum of the interior angles of a triangle is 180 , following the triangle sum theorem

From the information given, we have that;

The angles given are;

Angle 59

Angle 79

Angle 2x + 16

Now, equate the angles, we have;

59 + 79 + 2x + 16 = 180

collect the like terms, we have;

2x = 180 - 154

subtract the values

2x = 26

x = 13

Learn about triangles at: https://brainly.com/question/14285697

#SPJ1

Question 10 of 10
What is the range of y = sin x?
OA. -1 ≤ x ≤ 1
OB. All real numbers
O c. -1 ≤ y ≤1
OD. x #NT

Answers

The value of the range of function y = sin x is,

⇒ Range = -1 ≤ y ≤ 1

Since, A relation between sets of inputs which having exactly one output each is called a function.

And, an expression, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).

Here, The function is,

y = sin x

Now, We know that;

The range of y = sin x is,

⇒ Range = -1 ≤ x ≤ 1

Hence, Option A is true.

Learn more about the function visit:

https://brainly.com/question/11624077

#SPJ1

in a 2 x 3 between subjects anova, how many total groups are there?

Answers

In a 2 x 3 between subjects ANOVA, there are a total of 6 groups. The first factor, with 2 levels, divides the participants into two distinct groups. The second factor, with 3 levels, further divides each of the two groups into three subgroups. This results in a total of 6 groups.

In this design, each group consists of a unique combination of the two factors, ensuring that each participant is assigned to only one group.

The purpose of conducting a between-subjects ANOVA is to examine the main effects of each factor, as well as any possible interactions between them, on a dependent variable.To illustrate, let's say we are conducting a study on the effects of a new medication on anxiety levels. The first factor may be gender, with two levels: male and female. The second factor may be dosage, with three levels: low, medium, and high. This results in six groups: male/low dosage, male/medium dosage, male/high dosage, female/low dosage, female/medium dosage, and female/high dosage. It's important to note that each group should have a sufficient number of participants to ensure statistical power and reliability of the results. Additionally, the number of groups can impact the complexity of the statistical analysis and interpretation of the findings.

Know more about the ANOVA,

https://brainly.com/question/30762844

#SPJ11

Sarah and Asher began saving money the same day. Sarah's savings can be modeled by f(x) =12x+6
and Asher's savings plan can be modeled by g(x) =9x+30
where x
is the amount of money they had saved after x
weeks. After how many weeks will Sarah and Asher have saved the same amount of money?

Answers

The number of weeks in which Sarah and Asher have saved the same amount of money is 8 weeks.

How many weeks will Sarah and Asher have saved the same amount of money?

The number of weeks in which Sarah and Asher have saved the same amount of money is calculated by setting the two equations equal to each other as follows;

12x + 6 = 9x + 30

Simplify the equation by collecting similar terms as follows;

12x - 9x  = 30 - 6

3x = 24

x = 24/3

x = 8

Thus, the number of weeks in which Sarah and Asher have saved the same amount of money is 8 weeks.

Learn more about number of weeks here: https://brainly.com/question/25511600

#SPJ1

denote population standard deviation of the pulse rates of women (in beats per minute). identify the null and alternative hypotheses.

Answers

To denote the population standard deviation of the pulse rates of women (in beats per minute), we can use the symbol σ (sigma). Now, let's identify the null and alternative hypotheses.

Null hypothesis (H₀): There is no significant difference in the pulse rates of women.
Alternative hypothesis (H₁): There is a significant difference in the pulse rates of women.

These hypothesis can be tested using appropriate statistical methods to determine if there's evidence to support or reject the null hypothesis.                      

know more about.women (in beats per minute). identify the null and alternative hypotheses.

#sj11

Find the work done by F over the curve in the direction of increasing t. F = 2yi + 3xj + (x + y)k r(t) = (cos t)i + (sin t)j + ()k, 0 st s 2n

Answers

The work done by F over the curve in the direction of increasing t is 3π.

What is the work done by F over the curve?

To find the work done by a force vector F over a curve r(t) in the direction of increasing t, we need to evaluate the line integral:

W = ∫ F · dr

where the dot denotes the dot product and the integral is taken over the curve.

In this case, we have:

F = 2y i + 3x j + (x + y) k

r(t) = cos t i + sin t j + tk, 0 ≤ t ≤ 2π

To find dr, we take the derivative of r with respect to t:

dr/dt = -sin t i + cos t j + k

We can now evaluate the dot product F · dr:

F · dr = (2y)(-sin t) + (3x)(cos t) + (x + y)

Substituting the expressions for x and y in terms of t:

x = cos t

y = sin t

We obtain:

F · dr = 3cos^2 t + 2sin t cos t + sin t + cos t

The line integral is then:

W = ∫ F · dr = ∫[0,2π] (3cos^2 t + 2sin t cos t + sin t + cos t) dt

To evaluate this integral, we use the trigonometric identity:

cos^2 t = (1 + cos 2t)/2

Substituting this expression, we obtain:

W = ∫[0,2π] (3/2 + 3/2cos 2t + sin t + 2cos t sin t + cos t) dt

Using trigonometric identities and integrating term by term, we obtain:

W = [3t/2 + (3/4)sin 2t - cos t - cos^2 t] [0,2π]

Simplifying and evaluating the limits of integration, we obtain:

W = 3π

Therefore, the work done by F over the curve in the direction of increasing t is 3π.

Learn more about work done

brainly.com/question/13662169

#SPJ11

Fractions please help?!?

Answers

Answer: 2/3

2/3 x7 = 14/21
4/7 x3 = 12/21

Write the equation of each line

2. Point = (-9,3) Slope = - 2/3

4. With y-intercept = -3 and parallel to y = 5x - 2

5. With y-intercept = 9 and perpendicular to y = 1/2x + 1

Answers

Answer: Point-slope form equation:

Using the point-slope form equation, which is y - y₁ = m(x - x₁), where (x₁, y₁) is the given point and m is the slope, we can substitute the given values to find the equation.

Point = (-9, 3)

Slope = -2/3

Using the point-slope form equation:

y - 3 = (-2/3)(x - (-9))

Simplifying:

y - 3 = (-2/3)(x + 9)

Expanding:

y - 3 = (-2/3)x - 6

Rearranging:

y = (-2/3)x - 3

Therefore, the equation of the line is y = (-2/3)x - 3.

Parallel to y = 5x - 2:

The parallel line will have the same slope (5) as the given line because parallel lines have the same slope. The y-intercept is given as -3.

Using the slope-intercept form equation, which is y = mx + b, where m is the slope and b is the y-intercept, we can substitute the given values to find the equation.

Slope = 5

Y-intercept = -3

Therefore, the equation of the line is y = 5x - 3.

Perpendicular to y = (1/2)x + 1:

To find the perpendicular line, we need to take the negative reciprocal of the slope (1/2). The negative reciprocal of a number is obtained by flipping the fraction and changing the sign.

The given line has a slope of 1/2, so the perpendicular line will have a slope of -2 (negative reciprocal of 1/2). The y-intercept is given as 9.

Using the slope-intercept form equation, which is y = mx + b, where m is the slope and b is the y-intercept, we can substitute the given values to find the equation.

Slope = -2

Y-intercept = 9

Therefore, the equation of the line is y = -2x + 9.

consider a multiple regression model with two independent variables and no intercept, assume n independent observations are variables A. Write down the model in matrix form. Clearly indicate the content of every matrix used in this representationB. What is the rank of X. for the above model? Explain why?C. Compute the expressions for the least square estimators of B1 and B2. Do not oversimplify the elements in your matrics.

Answers

A. Matrix form as follows: Y = Xβ + ε

B. This is because one column of X can be expressed as a linear combination of the other column, resulting in a rank of 1.

C. β1 =[tex](X1^2 + X2^2)^{-1 }(X1Y) / (X1^2 + X2^2)^{-1} (X1^2)[/tex]

β2 = [tex](X1^2 + X2^2)^{-1} (X2Y) / (X1^2 + X2^2)^{-1} (X2^2)[/tex]

A. The multiple regression model with two independent variables and no intercept can be represented in matrix form as follows:

Y = Xβ + ε

where,

Y is an n x 1 vector of dependent variable observations

X is an n x 2 matrix of independent variable observations

β is a 2 x 1 vector of regression coefficients for the independent variables

ε is an n x 1 vector of errors

The matrix X contains the independent variable observations for each of the n observations, with each row representing an observation, and each column representing a different independent variable.

B. The rank of X is determined by the number of linearly independent rows in X. Since there is no intercept in the model, the columns of X are centered around zero, and therefore, the rank of X cannot exceed 1. This is because one column of X can be expressed as a linear combination of the other column, resulting in a rank of 1.

C. The least square estimators of β can be calculated as:

β = [tex](X^T X)^-1 X^T Y[/tex]

where, X^T is the transpose of X and[tex](X^T X)^-1[/tex] is the inverse of the matrix product of [tex]X^T[/tex] and X.

Expanding this formula, we get:

β =[tex][(X1^2 + X2^2) X1 X2]^-1 [X1 X2] [Y][/tex]

where,

X1 and X2 are n x 1 vectors representing the two independent variables in the model

[tex]X1^2[/tex] and[tex]X2^2[/tex]are n x n diagonal matrices with the squares of the elements of X1 and X2, respectively

[X1 X2] is an n x 2 matrix containing the two independent variables

[Y] is an n x 1 vector of dependent variable observations

Simplifying this expression, we get:

β1 =[tex](X1^2 + X2^2)^{-1 }(X1Y) / (X1^2 + X2^2)^{-1} (X1^2)[/tex]

β2 = [tex](X1^2 + X2^2)^{-1} (X2Y) / (X1^2 + X2^2)^{-1} (X2^2)[/tex]

where,

β1 is the least square estimator for the regression coefficient of X1

β2 is the least square estimator for the regression coefficient of X2

for such more question on Matrix

https://brainly.com/question/19865415

#SPJ11

olve the given initial-value problem. x' = −1 −2 3 4 x 5 5 , x(0) = −3 7

Answers

The solution to the given initial-value problem is:

[tex]x(t) = $\frac{1}{2}$e$^{-2t}$ $\begin{bmatrix}2\ -1\end{bmatrix}$ + $\frac{3}{2}$e$^{5t}$ $\begin{bmatrix}1\ 3\end{bmatrix}$ + $\begin{bmatrix}2\ -1\end{bmatrix}$[/tex].

How to find the initial-value problem?

To solve the given initial-value problem:

[tex]x' = $\begin{bmatrix}-1 & -2\ 3 & 4\end{bmatrix}$x + $\begin{bmatrix}5\ 5\end{bmatrix}$, x(0) = $\begin{bmatrix}-3\ 7\end{bmatrix}$[/tex]

First, we find the solution to the homogeneous system:

[tex]x' = $\begin{bmatrix}-1 & -2\ 3 & 4\end{bmatrix}$x[/tex]

The characteristic equation is:

[tex]|$\begin{bmatrix}-1-\lambda & -2\ 3 & 4-\lambda\end{bmatrix}$| = $\lambda^2-3\lambda-10 = 0$[/tex]

Solving the above quadratic equation, we get:

[tex]\lambda_1 = -2$ and $\lambda_2 = 5$[/tex]

The corresponding eigenvectors are:

[tex]v_1 = $\begin{bmatrix}2\ -1\end{bmatrix}$ and v_2 = $\begin{bmatrix}1\ 3\end{bmatrix}$[/tex]

Therefore, the general solution to the homogeneous system is:

[tex]xh(t) = c1e$^{-2t}$ $\begin{bmatrix}2\ -1\end{bmatrix}$ + c2e$^{5t}$ $\begin{bmatrix}1\ 3\end{bmatrix}$[/tex]

Next, we find the particular solution to the non-homogeneous system. We assume the solution to be of the form:

xp(t) = A

Substituting this in the given equation, we get:

[tex]A = $\begin{bmatrix}-1 & -2\ 3 & 4\end{bmatrix}$A + $\begin{bmatrix}5\ 5\end{bmatrix}$[/tex]

Solving for A, we get:

[tex]A = $\begin{bmatrix}2\ -1\end{bmatrix}$[/tex]

Therefore, the particular solution is:

[tex]xp(t) = $\begin{bmatrix}2\ -1\end{bmatrix}$[/tex]

The general solution to the non-homogeneous system is given by:

[tex]x(t) = xh(t) + xp(t) = c1e$^{-2t}$ $\begin{bmatrix}2\ -1\end{bmatrix}$ + c2e$^{5t}$ $\begin{bmatrix}1\ 3\end{bmatrix}$ + $\begin{bmatrix}2\ -1\end{bmatrix}$[/tex]

Using the initial condition [tex]x(0) = $\begin{bmatrix}-3\ 7\end{bmatrix}$,[/tex]we get:

[tex]c_1$\begin{bmatrix}2\ -1\end{bmatrix}$ + c_2$\begin{bmatrix}1\ 3\end{bmatrix}$ + $\begin{bmatrix}2\ -1\end{bmatrix}$ = $\begin{bmatrix}-3\ 7\end{bmatrix}$[/tex]

Solving for c₁ and c₂, we get:

[tex]c_1 = $\frac{1}{2}$ and c_2 = $\frac{3}{2}$[/tex]

Therefore, the solution to the given initial-value problem is:

[tex]x(t) = $\frac{1}{2}$e$^{-2t}$ $\begin{bmatrix}2\ -1\end{bmatrix}$ + $\frac{3}{2}$e$^{5t}$ $\begin{bmatrix}1\ 3\end{bmatrix}$ + $\begin{bmatrix}2\ -1\end{bmatrix}$.[/tex]

Learn more about initial-value problem

brainly.com/question/30547172

#SPJ11

the position of an object in circular motion is modeled by the given parametric equations, where t is measured in seconds. x = 4 cos(t), y = −4 sin(t

Answers

The given parametric equations model the position of an object in circular motion with radius 4 and center at the origin.

The given parametric equations are:

x = 4 cos(t)

y = -4 sin(t)

To understand the motion of the object, we can plot its position in the xy-plane as t varies.

The equation x = 4 cos(t) represents the horizontal position of the object, which varies between -4 and 4 as t varies between 0 and 2π. The equation y = -4 sin(t) represents the vertical position of the object, which varies between -4 and 4 as t varies between 0 and 2π.

Thus, the object moves in a circle of radius 4 centered at the origin, in a counterclockwise direction, completing one revolution in 2π seconds.

We can also find the equation of the circle in Cartesian form by eliminating t from the given equations. Squaring both equations and adding, we get:

x^2 + y^2 = 16

which is the equation of a circle with radius 4 centered at the origin.

For more questions like Equation click the link below:

https://brainly.com/question/29657983

#SPJ11

9. What is the surface area of the cone below? Figures are not drawn to scale.
Round your answer to the nearest whole number
Ale
14 in
17 in
O628 in^2
O 578 in^2
O 528 in^2
1005 in^2

Answers

The surface area of the cone rounded to the nearest whole number is 528 in².

The correct answer choice is option C

What is the surface area of the cone?

Surface area of a cone = πr² + πrl

π = 3.14

Radius, r = diameter / 2

= 14 in / 2

= 7 in

slant height, l = 17 in

Surface area of a cone = πr² + πrl

= (3.14 × 7²) + (3.14 × 7 × 17)

= (3.14 × 49) + (373.66)

= 153.86 + 373.66

= 527.52 square inches

Approximately,

528 in²

Therefore, 528 in² is the surface area of the cone.

Read more on surface area:

https://brainly.com/question/16519513

#SPJ1

A multiple choice question has 5 possible answers. What are the odds in favor of guessing the right answer? A. 1:5 B. 4:1 C. 1:4 D. 3:2

Answers

The odds that are in favour of guessing the right answer would be = 1:5. That is option A.

How to determine the odds in favour of the right answer?

The given multiple choice questions has only 5 possible answers.

This means that when both the correct and wrong answers are added together, the total should be = 5.

That is;

4:1 = 4+1 = 5

1:4 = 1+4 = 5

3:2 = 3+2 = 5

Therefore, 1:5 = 1+5 = 6 which can't be a possible answer as it's more than the total of the multiple choice questions.

Learn more about probability here:

https://brainly.com/question/31123570

#SPJ1

−12m2 +8m3 +3mn−12m3n2 −2+14m2n+6m3n2 −11m2 −2+14m2n+6m3n2 −11m2

Answers

The value of the algebraic expression is -4m³ -22m² +28m²n +3mn -4

How to simplify the expression?

In mathematics, an algebraic expression is an expression built up from constant algebraic numbers, variables, and the algebraic operations (addition, subtraction, multiplication, division and exponentiation by an exponent that is a rational number). For example, 3x² − 2xy + c is an algebraic expression.

The given expression is

−12m2 +8m3 +3mn−12m3n2 −2+14m2n+6m3n2 −11m2 −2+14m2n+6m3n2 −11m2

Rearrange this by collecting the like terms to have

8m³ - 12m² -11m² -11m² -12m³n² +6m³n² +6m³n² +14m²n + 14m²n + 3mn -2 -2

Simplify further to have

-4m³ -22m² +28m²n +3mn -4

In conclusion the expression gives -4m³ -22m² +28m²n +3mn -4

Learn more about algebraic expression on https://brainly.com/question/28884894

#SPJ1

Find the curl and divergence of the vector field b) F(x, y, z) = (e^x sin y, e^y sin z, e^z sin x)

Answers

The curl of the vector field F is (cos x - e^x sin z, cos y - e^y sin x, cos z - e^z sin y). The divergence of the vector field F is 0.

To find the curl of the vector field F(x, y, z) = (e^x sin y, e^y sin z, e^z sin x), we use the formula for curl:

curl(F) = (∂Fz/∂y - ∂Fy/∂z, ∂Fx/∂z - ∂Fz/∂x, ∂Fy/∂x - ∂Fx/∂y).

Calculating the partial derivatives:

∂Fz/∂y = e^z cos x, ∂Fy/∂z = e^y cos z,

∂Fx/∂z = e^x cos z, ∂Fz/∂x = e^z cos y,

∂Fy/∂x = e^y cos x, ∂Fx/∂y = e^x cos y.

Substituting these values into the curl formula, we get:

curl(F) = (e^z cos x - e^y cos z, e^x cos z - e^z cos y, e^y cos x - e^x cos y).

Simplifying further, we have:

curl(F) = (cos x - e^x sin z, cos y - e^y sin x, cos z - e^z sin y).

To find the divergence of the vector field F, we use the formula for divergence:

div(F) = ∂Fx/∂x + ∂Fy/∂y + ∂Fz/∂z.

Calculating the partial derivatives:

∂Fx/∂x = e^x sin y, ∂Fy/∂y = e^y sin z, ∂Fz/∂z = e^z sin x.

Adding these values together, we get:

div(F) = e^x sin y + e^y sin z + e^z sin x.

Simplifying further, we have:

div(F) = 0.

Therefore, the divergence of the vector field F is 0.

For more questions like Vector click the link below:

https://brainly.com/question/29740341

#SPJ11

the margin of error is a calculation that describes the error introduced into a study when the sample isn't truly random. true false

Answers

Answer: false

Step-by-step explanation:

- Norman and Suzanne own 32 shares of a fast food restaurant stock and 78 shares of a toy company stock. At the close of the markets on a particular day in 2004, their stock portfolio consisting of these two stocks was worth $1391.00. The closing price of the fast food restaurant stock was $28 more per share than the closing price of the toy company stock on that day. What was the closing price of each stock on that day? The price per share of the fast food restaurant stock is $?​

Answers

the closing price of the toy company stock on that day was approximately $4.50 per share, and the closing price of the fast food restaurant stock was approximately $32.50 per share.

How to solve a first degree equation?

To solve a first-degree equation, we must find the value of the unknown (which we will call x) and, for this to be possible, just isolate the value of x in equality, that is, x must be alone in one of the members of the equation.

Organize the information:

Norman and Suzanne own 32 shares of the fast food restaurant stock, so the value of those shares is 32 * y.They also own 78 shares of the toy company stock, so the value of those shares is 78 * x.The total value of their stock portfolio is $1391.00.

Organize the information into equations:

32y + 78x = 1391 y = x + 28

Substitute the value of y from Equation 2 into Equation 1:

[tex]32(x + 28) + 78x = 1391\\32x + 896 + 78x = 1391\\110x + 896 = 1391\\110x = 495\\x=4.5[/tex]

Now find the value of Y:

[tex]y = x + 28\\y = 4.50 + 28\\y=32.5[/tex]

Therefore, the closing price of the toy company stock on that day was approximately $4.50 per share, and the closing price of the fast food restaurant stock was approximately $32.50 per share.

See more about equations at brainly.com/question/29657983

#SPJ1

Other Questions
A circle has a circumference of 1{,}133.541,133.541, comma, 133, point, 54 units.What is the diameter of the circle? units 3What is the remainder when 2,308 is divided bynine? Give your answer as a fraction. Through geologic dating methods (discussed in another lab), it has been determined that the offset inWallace Creek shown in Figure 4 is 3,700 years old. The length of the offset is 123 m. How fast are the platesmoving along the San Andreas Fault in cm/yr? 1/2{x-1/6}+2/3=5/6+1/3 (1/2-3x) Which excerpt from Part 2 of The Odyssey is cited properly in MLA style? What is the value of x? what are the three distinctive characteristics of a terrorist? A mug is 1/3 full. The mug contains 5/6 of a cup of water. Find the capacity of the mug. Write the answer as a fraction or mixed number in simplest form.I need this Asap :) PLS and THANK YOU The following passage appears in an online article. Paraphrase the information for your research report about DNA.Scientists believe some day farmers will grow plants with black leaves. These leaves would be able to change sunlight into energy. F. Dyson, a genetics expert, claims, "This would help reduce poverty in rural parts of the world because farmers could grow black plants and sell them at a healthy profit." He also sees a day when termites will eat rusty metal and trees will produce liquid fuel. "The secret lies in DNA," says Dyson. (15 points) porque es importante para una Persona para permanecer a una Familia Thomas has sixty-two cents. How much money is this?$0.62$6.02$62$6.20Done For the salad bar, Channing must divide 8 bags of lettuce equally among 3 serving bowls. How many bags of lettuce would be in each serving bowl if they are divided equally? Pls answer...thanks. What happened to Mrs.Stevenson As atmospheric CO2 increases, the amount of CO2 dissolved in seawater is expected to increase as well. This produces more carbonic acid, which then dissociates into hydrogen ions and something else. CupboardFont12.3Classification of Living Things PracticeIdentify the feature of life that is illustrated by each of the following statements."That boy shot up five inches in only one year.""Our cat had a litter of kittens yesterday""My dog has become much less clumsy now that he is a year old."4."Eat a good breakfast and you will be able to run longer""When that car pulled in the driveway, my cat ran to hide under the porch.""That owl's night vision allows it to see the movement of mice on even thedarkest night."7"Single-celled organisms live in the pond behind school."8Your body normally maintains a temperature of 98.6F.9.A giraffe uses its long neck to eat from the high branches of a tree.5.610.A bear hibernates when it's cold, Consider the final stanza of the poem. How does the conclusion contribute to the theme of the poem? Use textual evidence to support your answer. (RACE format) "On Turning Ten Poem" PLZZZZZ HELP AND HURRRRRY! 19)Why are unique atomic spectra produced by different elements? Which of the following is NOT an example of natural selection? A People selectively breeding pitbulls.B Insect populations developing resistance to certain pesticides.C Male birds of certain species developing colorful feathers to attract female mates.D Bacteria becoming resistant to antibiotics.