A factory was ordered to reduce the amount of pollution by 51% in two years with the same percent decrease each year. What is this percentage?
PLEASE HELP!!!
Answer:
30%
Step-by-step explanation:
You want the percentage reduction each year that will result in a reduction of 51% over two years.
Growth factorThe growth factor is 1 added to the growth rate. If the desired growth rate over 2 years is -51%, then the growth factor for that period is ...
1 -51% = 0.49
If the growth factor is the same for each of two years will be ...
(1 +r)² = 0.49 . . . . . . . where r is the growth rate each year
Growth rateSolving for r gives ...
1 +r = √(0.49) = 0.7
r = 0.7 -1 = -0.3 = -30%
The required growth rate each year is -30%.
The pollution must be reduced by 30% each year for 2 years.
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The ratio of dogs to cats at an animal shelter is 4 : 3. there are 40 more dogs than cats in this shelter. how many of each animal is in this shelter?
There are 80 dogs and 20 cats in the animal shelter.
The ratio of dogs to cats is 4:3. This means for every 4 dogs, there are 3 cats. We know that there are 40 more dogs than cats.
To calculate the number of each animal, we can set up the equation 40 = 4x - 3x, where x represents the number of cats.
After solving the equation, we get x = 20. This means that there are 20 cats in the animal shelter. To find the number of dogs, we can use the ratio. We know that for every 4 dogs, there are 3 cats. So, for 20 cats, there must be 4 × 20 = 80 dogs.
Therefore, there are 80 dogs and 20 cats in the animal shelter.
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What 3D shape would result if you repeated the paper scaling with a piece of paper that was circular rather than rectangular (we did rectangular in class). What shape would you build?
The resulting 3D shape would be a
Answer:
3 d shape is in rectangular
Simplify the expression. 3 ^4s
Answer:
81s
Step-by-step explanation:
3^4s
3x3x3x3s
If h(x)=3x+1 and g(x)=x^2-5 Evaluate h(-2)+g(4)
The value of h(-2)+g(4) by substitution is 6
What is substitution of variables?The method of solving "by substitution" works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, "substituting" for the chosen variable and solving for the other. Then you back-solve for the first variable.
For instance if h(x)=3x+1 . This means h(-2) means we are going to substitute -2 for variable x
Therefore h(-2) = 3(-2)+1
= -6+1 = -5
Similarly g(x)=x²-5. This means g(4) means we are going to substitute 4 for x in the equation.
Therefore g(4) = 4²-5
= 16-5 = 11
Therefore h(-2)+g(4) = -5+11
= 6
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Jason plots three points on a coordinate plane and sees that they do not create a function the three points he plots are (-2,5),(-5,9),(x,-3)
The possible values of x, so that the relation does not form a function, is given as follows:
x = -2 or x = -5.
When does a relationship represents a function?To verify whether a relation represents a function, we need to observe if each input is mapped to only one output.
The points for the function in this problem are given as follows:
(-2,5),(-5,9),(x,-3)
The meaning of each point is that:
(-2,5): input of -2 is mapped to an output of 5.(-5,9): input of -5 is mapped to an output of 9.(x, -3): input of x is mapped to an output of -3.The relation is not a function, meaning that the value of x is either of x = -2 or x = -5, which are already mapped to another value of x.
Missing InformationThe problem asks for the values of x so that the relation is not a function, considering the three points that were given on the problem.
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Is 2 or 5 an ordered pair?
Answer:
If it's written like this: (2, 5) then it is a ordered pair
Step-by-step explanation:
If amy walked 25 seconds how many feet did she travel
(its ratio or unit rates i forgot.)
Feet Second
18. 3.
48. 8.
25
c
If Amy walked 25 seconds, she travelled 150 feet.
What is direct proportion?The definition of direct proportion states that "When the relationship between two quantities is such that if we increase one, the other will also increase, and if we decrease one the other quantity will also decrease, then the two quantities are said to be in a direct proportion". which means the ratio of two quantities is constant.
Given, In table
Relationship between distance and time of Amy travel is given
Feet Second
18 3
48 8
c 25
From the above table ratio between distance and time = Distance/ Time
= 18/3 = 48/8 = c/25
= 6/1 = 6/1 = c/25
⇒ c/25 = 6/1
⇒ c = 6 × 25 = 150
So, In 25 seconds distance will be 150 feet.
Hence, in 25 seconds Amy will travel 150 feet.
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A line is drawn so that it passes through the points (-5,0) and (5,4). What is the slope of the line? Round the answer to the tenths place. If the answer is a whole number than make the tenths place a zero to be counted as correct.
The slope of a line is calculated using the formula slope = (y2 - y1) / (x2 - x1). the answer is 2.0.
In this case, the formula would be slope = (4 - 0) / (5 - (-5)) = 4 / 10 = 0.4.
When rounded to the tenths place, the answer is 2.0.
The slope of a line is calculated by applying the formula slope = (y2 - y1) / (x2 - x1). In this particular problem, the formula would be slope = (4 - 0) / (5 - (-5)) = 4 / 10 = 0.4. Since the answer needs to be rounded up to the tenths place, the answer is 2.0. This answer can be verified by graphing the two points given and using the line of best fit to measure the slope. The line passes through the two given points (-5, 0) and (5, 4) and has a slope of 2.0.
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Fisherman catches in fish their total mass is 15kg write down the average mass of fish in terms of n. if the average mass of a fish was 3/4 kg. Find the number of fish caught
Therefore , the solution of problem of average the number of
fish caught is 20.
How can we determine the average?Average The arithmetic mean is calculated by adding a set of numbers, dividing by their count, and then taking the result.
For instance, the result of 30 division by 6 is 5, which is the average of 2, 3, 3, 5, 7, and 10.
Here,
Given,
total mass of fish=15kg
average of fish=3/4kg
number of fish=?
Number of fish=total mass/average
number of fish=15/(3/4)=20
Therefore , the solution of problem of average the number of times is
fish caught is 20.
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Write an exponential function that models the info below.
An initial value of 1,425 increasing at a rate of 5%.
Answer:
y = 1425 * (1 + 0.05)^x
Step-by-step explanation:
An exponential function of the form y = a * b^x can be used to model exponential growth or decay, where a is the initial value, b is the base (growth or decay factor), and x is the time period. In this case, the initial value is 1,425 and the rate of increase is 5%. We can write this as an exponential function as follows:
y = 1425 * (1 + 0.05)^x
where y is the final value after x time periods, and x is the number of time periods (in years, for example). To find the value of the function after x time periods, you can substitute the value of x into the equation.
Describe the transformation that is needed to obtain the graph of h(x)=0.8x+3 from the graph of h(x)=0.8x
The transformation applied to function h(x) is a translation of 3 units upwards.
Which is the transformation applied?For a function f(x), we can define a vertical translation of N units as:
g(x) = f(x) + N
This will move the graph of f(x) N units vertically.
If N > 0, the translation is upwards.if N < 0, the translation is downwards.Here we start with the function h(x) = 0.8*x
And we want to see which transformation will give us g(x) = 0.8*x + 3
We are just adding 3, so this is a translation of 3 units upwards.
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It's supposed to be 7th grade math not high school.
Answer:
B. Isosceles
Step-by-step explanation:
It is 7th grade, maybe even 5th or 6th.
A scalene has no equal sides.
An isosceles has 2 equal sides
An Equilateral has 3 equal sides
Acute has angles less than 90 degrees
The box in the corner means 90 degrees so it's a right triangle and the ticks mean congruent. Obviously right isn't one of the options so isosceles is correct
Answer:
Isosceles Triangle
Step-by-step explanation:
An Isosceles or a scalene can have a right angle, but a scalene right triangle has a longer side that isn't equivalent like the sides of this triangle. So this makes it isosceles.
-Hope this helped
The bar chart below shows the monthly energy bill for Wally's tackle shop.
Which of the listed months had bills between $40 and $50? Scroll down to
see all six answer options and check all that apply.
Energy bill (S)
70
09
10
January
February
March
Apri
May
am
July
Months
August
September
October
November
December
On solving the provided question, we can say that from the bar chart provided , months which had bills between $40 and $50 are March, June, and November
what is bar chart?A bar graph or chart presents specific statistics using square bars with heights or lengths proportional to the numbers they represent. You can plot the bars either vertically or horizontally. Sometimes a column chart is used to refer to a vertical bar chart. The visual representation of data (often grouped) in the form of square, vertical or horizontal bars, where the length of the bars is related to the level of statistics, is called a bar graph. Bar charts are another name for them. One way to manage statistical data in statistics is via bar graphs.
from the bar chart provided ,
months which had bills between $40 and $50 are
March, June, and November
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A train left Vicky' town and traveled for 4 hour and 50 minute to Wildgrove. Then it traveled 2 hour and arrived in Wetminter at 12:28 P. M. What time did the train leave Vicky' town?
The train left Vicky's town at 7:38 A.M. after traveling for 4 hours and 50 minutes to Wildgrove.
To calculate this, we need to work backward from the arrival time in Westminster. The train arrived in Wetminter at 12:28 P.M. and it took 2 hours to travel from Wildgrove to Westminster. So, if we subtract 2 hours from 12:28 P.M., we get 10:28 A.M.
Next, we need to take into account the time it took for the train to travel from Vicky's town to Wildgrove. The train traveled for 4 hours and 50 minutes to Wildgrove.
So, if we convert 4 hours and 50 minutes to minutes (4*60+50 = 290 minutes) and subtract it from 10:28 A.M., we get 7:38 A.M. This is the time the train left Vicky's town.
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i need help on this quiestion
when x is 0.5 then y value is 3, x is 1.5 then y is 9 and x is 4.5 then y is 27.
What is Ratio?A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0.
A proportion is an equation in which two ratios are set equal to each other
In the given table the value of x is 0.5 and value of y is 3
y/x=3/0.5=6
In the second row the value of x is 1.5 we need to find value of y.
3/0.5=y/1.5
4.5=0.5y
Divide both sides by 0.5
y=9
In third row the value of x is 4.5 and y is 27
Hence, when x is 0.5 then y is 3, x is 1.5 then y value is 9 and x is 4.5 then y is 27.
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intiderivatives & Indefinite Integrals (x^3-2)dx
The final solution of the given integral ∫ ([tex]x^3[/tex] - 2) dx is ([tex]x^4[/tex])/4 - 2x + C.
To integrate ∫ (x^3 - 2) dx, we use the power rule of integration, which states that ∫[tex]x^n[/tex] dx = ([tex]x^{(n+1)}[/tex])/(n+1) + C, where C is the constant of integration.
In this case, we have [tex]x^3[/tex] as the inside function, so we apply the power rule by raising the exponent by 1 and dividing by the new exponent. This gives us ([tex]x^4[/tex])/4 + C as the antiderivative.
However, we also have the constant term -2. To integrate a constant term, we add it as a separate term to the antiderivative. So the final solution is ([tex]x^4[/tex])/4 - 2x + C.
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what is the diameter of the semi circle whose perimeter is 54
Answer:
The diameter will be equal to twice the radius. Therefore, Hence, the radius and the diameter are equal to 10.5 cm and 22 cm
make p subject formula in I=PRT/100
Answer:
P=Ix100/RT
therefore P is made the subject formula
The table represents a linear relationship.
x −1 0 1 2
y 2 0 −2 −4
Which of the following graphs shows this relationship?
graph of a line passing through the points negative 2 comma negative 4 and 0 comma 0
graph of a line passing through the points negative 2 comma negative 1 and 0 comma 0
graph of a line passing through the points negative 2 comma 4 and 0 comma 0
graph of a line passing through the points negative 2 comma 1 and 0 comma 0
The graph that shows the relationship is graph of a line passing through the points negative 2 comma 1 and 0 comma 0. Option D
What are the points on the graph?We know that a straight line graph is the kind of graph that we can be able to represent by the use of the equation; y = mx + c. Now we could have a straight line graph that passes through points.
The points that the graph would have to pass through are also the points that we can see on the graph of the function whose table have been shown in the question.
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Answer:
(-2,1) (0,0) D
What is the slope of Y 10x 1?
The slope of the given equation y = 10x + 1 is 10.
If we draw the graph of the linear equation y = mx + c. The result is a line with m as the slope, and c as the y-intercept. This form of the linear equation y = mx + c is called the slope-intercept form, and the values of m and c are real numbers.
The slope, m, of the line represents the steepness of a line. This is also termed a gradient, sometimes. The y-intercept, c, of the line y = mx + c represents the y-coordinate of the point where the graph of the line intersects the y-axis.
Now, if we equate the standard slope-intercept form of the equation with the given equation, we get
y = mx + c
y = 10x + 1
m = 10 and c = 1
As we know the m is the slope which is equal to 10.
-- The given question is incorrect, the correct form of equation is
"What is the slope of y = 10x + 1?" --
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Tony and Jacob are selling fruit for a school fundraiser. Customers can buy small boxes of grapefruit and large boxes of grapefruit. Tony sold 12 small boxes of grapefruit and 8 large boxes of grapefruit for a total of $276. Jacob sold 6 small boxes of grapefruit and 9 large boxes of grapefruit for a total of $228. find the cost each of one small box of grapefruit and one large box of grapefruit
The cost of one small box of grapefruit and one large box of grapefruit is
What is Simultaneous equation?Simultaneous equations are two or more algebraic equations with the same unknown variables and the same value of the variables satisfies all such equations. This implies that the simultaneous equations have a common solution. Some of the examples of simultaneous equations are: 2x - 4y = 4, 5x + 8y = 3.
represent small box by x and large box by y
12x + 8y = 276 equation 1
6x + 9y = 228 equation 1
make the coefficients of x equal by multiplying equation 2 by 2
12x + 8y = 276 equation 3
12x + 18y = 456 equation 4
subtract equation 3 from 4
10y = 180
y = 180/10
y = 18
substitute 18 for y in equation 1
12x + 6×18 = 276
12x = 276-108
12x = 168
x = 168/12
x= 14
therefore the cost of one small boxes is $14 and the cost of one large box is $18
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The area of a square living room is 256 ft2
256
ft
2
. Which is the length of the room?
Answer:16ft
√256=16ft
length=16ft
An architect built a scale model of a convention center using a scale in which 5 inches
represents 60 feet. The height of the convention center is 240 feet.
What is the height of the scale model in inches?
F) 0.6 in.
G) 36 in.
H) 20 in.
J) 300 in.
Therefore , the solution to the given problem of perimeter model of the sports stadium has a 12 inch height. The right response is option C.
Define Perimeter.The perimeter of a shape is sometimes refers to as its entire length in geometry. The perimeter of something like a form can be calculated by summing the distances of all of its sides and edges. The lenght of all a form's sides can be added up to find its perimeter. A rectangle that is 24 yards long and 15 yards broad, for instance, will have a perimeter of 78 yards.
Here,
A man can cover 6 miles on foot in 2 hours.
A man will cover 3 miles on foot in one hour.
10 potatoes can be sliced by a machine in 5 minutes.
2 potatoes can be cut by a machine in a minute.
Those are
2 inches per thirty feet
By 30 multiply both sides.
1 foot Equals 2/30 inches.
Now,
1 foot Equals 2/30 inches.
180 times on both sides.
180 feet = 180 x 2/30 inch
180 feet equals 6 by 2 inches.
120 feet equals 12 inches.
Thus,
Considering that a foot equals two inches, a sports arena's height would be 180 feet.
The scale model of both the sports stadium has a 12 inch height.1 foot Equals 2/30 inches.
Now,
1 foot Equals 2/30 inches.
180 times on both sides.
180 feet = 180 x 2/30 inch
180 feet equals 6 by 2 inches.
120 feet equals 12 inches.
Thus,
Considering that a foot equals two inches, a sports arena's height would be 180 feet. The scale model of both the sports stadium has a 12 inch height.
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Fill in the blank question.
A bathtub contains 6012
gallons of water. When the drain plug is pulled, the tub drains at an average rate of 4.5 gallons per minute. In how many minutes will the amount of water in the bathtub be 24.5 gallons?
Answer:
1326.78 minutes
Step-by-step explanation:
We know that the bathtub starts with 6012 gallons of water and that it drains at an average rate of 4.5 gallons per minute. To find how many minutes it will take to reach 24.5 gallons, we can use the formula:
time = (initial amount - final amount) / rate
Plugging in the given values, we get:
time = (6012 - 24.5) / 4.5
Solving for time:
time = 1326.78 minutes
It will take 1326.78 minutes for the bathtub to drain to 24.5 gallons of water.
Which side is opposite of 30 in a 30 − 60 − 90 triangle?
The side opposite the 30-degree angle is called the shorter leg in a 30 − 60 − 90 triangle
A right triangle is any triangle that has a 90-degree angle.
A 30-60-90 triangle is a special type of right triangle that has a 30-degree angle and a 60-degree angle in addition to the right angle.
The side opposite the 30-degree angle is called the shorter leg.
The side opposite the 60-degree angle is called the longer leg.
The side opposite the right angle of 90 degrees is called the hypotenuse.
The hypotenuse is twice the shorter leg.
The longer leg is √3 times the shorter side.
if the length of the shorter leg is given, then these properties are used to find the longer side and the hypotenuse.
However, the 30-60-90 properties hold no matter which side is provided.
If the length of the hypotenuse is given, divide it by 2 for the shorter leg. Then multiply that result by √3 to get the length of the longer leg.
If the length of the longer leg is given, divide it by √3 to get the shorter leg. Then, multiply that result by two to get the length of the hypotenuse.
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What are the steps in solving systems of equations using substitution method?
The steps in solving systems of equations using the substitution method include simplifying the given equation, solving one of the equations for any unknown value, substituting the step 2 solution in another equation, solving the new equation, and finally solving the equation to find the second variable.
The substitution method is the algebraic method to solve different linear equations. In this method of substitution, the value of one variable from either of the equation is substituted in the other equation.
In this technique the following steps are used to solve an equation by substitution method:
Step 1. Simplify the given equation by removing the parenthesis.
Step 2. Solve one of the equations for any unknown value.
Step 3. Substitute step 2 result in the other equation.
Step 4. Now solve the equation which gets from step 3 obtained using elementary arithmetic operations.
Step 5. Finally, solve the final equation for the second variable.
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What is an example of a two-step inequality?
A two-step inequality is an inequality that requires more than one step to solve. An example of a two-step inequality is to solve the inequality 2x - 3 ≥ 5.
Example: Solve the inequality 2x - 3 ≥ 5
Step 1: Isolate the variable by adding 3 to both sides: 2x ≥ 8
Step 2: Divide both sides by 2: x ≥ 4
In this example, the first step is to isolate the variable x by adding 3 to both sides of the inequality. In the second step, we divide both sides by 2 to get the final solution of x ≥ 4.
It's worth noting that this inequality has a solution that is an interval, it is x ≥ 4, which means that all values of x that are greater or equal to 4 are solutions of the inequality.
It's important to keep in mind that inequalities may require multiple steps to solve and may not always have a single solution. It's important to check the solution by substituting back into the inequality to make sure it holds true.
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An architect has designed two tunnels. Tunnel A is modeled by2+7+30x+56=0, and tunnel B is modeled by 2-3x+15y-55-0, where all measurements
are in feet. The architect wants to verify whether a truck that is 8 feet wide and 13.5 feet high can pass through the tunnels.
Part A: Write the equation for Tunnel A in standard form and determine the conic section. Show your work. (4 points)
Part B: Write the equation for Tunnel B in standard form and determine the conic section. Show your work (4 points)
Part C: Determine the maximum height of each tunnel is the truck able to pass through either tunnel without damage? If so, which tunnel(s) and why? Show your
work. (7 points)
Trucks will be able to pass through tunnel B while tunnel A is destroyed.In light of this, the equations for tunnels A and B are x2 + y2 + 30x + 56 = 0 and x2 - 30x + 16y - 95 = 0, respectively.
What is the standard form of parabola equation?A parabola's general equation is either y = a(x-h)2 + k or x = a(y-k)2 + h, where (h, k) stands for the vertex.
y2==4ax is the typical equation for a normal parabola.
Section A: x2+y2+30x+56=0
On both sides of an equation, add 152.
This is,
x²+30x+15²+y²=-56+15²
⇒ (x+15)²+y²=169⇒ (x+15)²+y²=13²
On both sides of the equation, divide 132.
⇒ (x+15)²/13² + y²/13² =1
Part B:x²-30x+16y-95=0
x2-30x+16y=95 now,
On both sides of an equation, add 152.
In other words, x2-30x+152+16y=95+152
⇒ (x-15)²=320-16y
⇒ (x-15)²=16(20-y) (20-y)
Part C:greatest height:A: 13 feet
B: 20 feet ,8 feet wide
A: x+15=8/2=4 y=12.37<13.5
B: x-15=8/2=4 y=19>13.5
In turn, tunnel A will sustain damage while the truck can travel via tunnel B.
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What is the solution of 7x 9 16?
The solution of 7x -9 = 16 is x = 25/7. It is called a linear equation as it contains a highest degree of 1.
The general form of a linear equation is ax + by + c = 0, where a, b, c are real numbers and at least one of a or b is not zero.
In the given equation above, 7x - 9 - 16 = 0.
7x - 25 = 0
Here, a = 7, b = 0, c = -25
To find the solution of this equation, we must make x as subject.
7x - 25 = 0
7x = 25
x = 25/7
Thus, the required solution of the given equation is calculated to be 25/7.
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