Mathematics Middle School

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The answer is, "3 hours", But you need to show your work to back this answer up.

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Answer 1

Start by writing an expression out. It would be 300 + 60x = $480. Then solve for x. Hope this helps!

Related Questions

Evaluate the given algebraic expressions replacing x with -2 and y with 1

[tex]3x^{2}[/tex]

Answers

Answer: -6

Step-by-step explanation: -2^1 = -2

3 x -2 = -6

Maybe that I'm wrong, Only one way to find out.

There were 35 students in a school. 20 of the students passed a test. The rest were shared equally among 3 teachers for extra classes. How many students did each teacher receive?

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Answer:

5 students

Step-by-step explanation:

35-20=15

15/3=5

Answer:

35 kids 20 students pass the test 35 -20 = 15 divided by 3 =5 students per teacher.

Step-by-step explanation: hope this helps can I be brainlyest. This is a bunny /\__/\

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100 POINTS+BRAINLIEST 8TH GRADE MATH PT 6: SIMPLIFY THE GIVEN EXPRESSION -I know how to do the distributive property but i don't know the rules to remember when dealing with rearranging subtraction sings like the one in the first set of parenthesis. please tell me how to accurately simplify an expression with those subtraction signs

thanks so much!!

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Answer:

[tex]-x + 9[/tex]

Step-by-step explanation:

Hello!

We want to combine any like terms and distribute the signs properly to the terms in the parentheses.

First, remove the parentheses by distributing the signs:

[tex]-(2x - 1) + 3(x + 4) - 2(x + 2)[/tex][tex]-(2x) - (-1) + 3(x) + 3(4) - 2(x) - 2(2)[/tex]

Remember that negative times negative is positive
[tex]-2x + 1 + 3x + 12 - 2x - 4[/tex][tex]-2x + 3x - 2x + 1 + 12 - 4[/tex][tex]-x + 9[/tex]

The simplified form is [tex]-x + 9[/tex].

Another way to think about the negative sign is by replacing it with -1, so essentially you are multiplying the whole parentheses by -1.

-(2x-1)+3(x+4)-2(x+2)-2x+1+3x+12-2x-4-4x+3x+1+8-x+9

Option D

Q.3 - The table and the graph each show a different relationship between the same two variables, x and y:

How much more would the value of y be in the table than its value on the graph when x = 11?

Answers

Because y=20x in this table, the value of y is worth 20 times as much as the value of 11.

How can I tell which graph represents the function's graph?

A feature's graph In a plane of the form (x, f(x)), all factors have the form f. As a side note, the graph of f may also be thought of as the graph of y = f. (x). Because of this, a feature's graph is a particular case in the graph of an equation.

When it comes to graphing, what exactly is the axis?

To explain the graph's meaning and the measuring devices, an axis is a line drawn to the graph's aspect or backside. It is possible to provide information about what the graph shows by labeling the x-axis, the horizontal line at its lowest point.

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Question 8(Multiple Choice Worth 5 points)
(01.03 MC)
Which expression is equivalent to 32.3-52
0
3³

Answers

Answer:

1/3^3

Step-by-step explanation:

The answer is 1/3^3 or 1/27 because 3^2 is 9 and 3^-5 is 1/243. This results in the equation 9 x 1/243. When simplified you get 1/3^3 or 1/27.

1/3^3

3^2(3^-5) = 3^2-5 = 3^-3 = 1/3^3

What’s the measure of x?

( It’s on khan academy ) thanks :)

50 points!!! and will give brainlyiest

Answers

Answer:

[tex]\huge\boxed{\sf x =28 \textdegree}[/tex]

Step-by-step explanation:

Given that,

∠IAK = 62°

∠IAK + ∠IAD = 90° (Complementary angles)

62 + ∠IAD = 90°

Subtract 62 to both sides

∠IAD = 90 - 62

∠IAD = 28°

∠IAD = ∠ACB (Corresponding angles are equal)

So,

∠ACB = 28°

∠ACB = ∠GCJ (Vertically opposite angles are equal)

So,

28° = x°

x° = 28°

[tex]\rule[225]{225}{2}[/tex]

Answer:

28 degrees

Step-by-step explanation:

If two lines cross each other, it makes 4 angles, and 2 angles from opposite sides have the same length. Since line KL and line IJ crossed, angle KAI and angle LAJ will have the same angle.

--> Angle LAJ is 62 degrees

If we look closely, there is a triangle ABC, and since the question said that line KL and line FG is perpendicular, the angle ALG will be 90 degrees.

We know that in a triangle, there are three angles, and the angle measures combined equals 180.

Since we know two angles: 90 and 62, we take them away from 180 to find the last angle BCA.

--> 180 - 90 - 62 = 28

--> Angle BCA = 28 degrees

Like I said at the beginning, if two lines cross each other, opposite angles are the same size. So angle x will also be equal to angle BCA, which is 28 degrees.

Angle x = 28 degrees

HELP PLEASE!!!!!!!!!!!!!!!!!!!! I NEED IT ASAP!!!!!!!!!

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i hope this helpssss

The answer is

x = 25

6.) Michael & Melissa both claim to be earning a C average, 70% to 79%, in their Latin Class. Use the table below to explain their reasoning and determine which student is earning a C average.

Answers

To figure out the average of Michael and Melissa we must add up all their test scores and divide the by 7; which is the number of tests they took.

Michael:

(80+76+73+70+40+25+10)/7

Melissa:

(88+83+75+70+60+65+62)/7

Michael's average is 53.4

Melissa's average is 71.9

So Melissa is earning a C in Latin.

Answer: Melissa. It won’t let me explain.

Q.2 - The graph shows the number of paintballs a machine launches, y, in x seconds:

Which expression can be used to calculate the rate per second at which the machine launches the balls?

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Answer:

Step-by-step explanation:

the answer is c hope this help norc3:

if x equals y what does y equal

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Answer:

Step-by-step explanation:

If x is y than y is equal to x only

the answer is x!
x=y & y=x :)

hello can someone help me with this

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Answer:

I am going to answer the ones you haven't answered yet...

Bullet point 2: The Y-intercept is where the graph crosses the y-axis in this case that would be y=0 or (0,0)

Bullet Point 5: the question basically says that for the values of x when they are between 0 and 6 the y values are ___. the answer for this one would be y ≥ 0.

hi how are u doing today

PLEASE HELPPPPPP!!!!!!!!
Jane read 1/4 of a 400-page book. How many pages are left to read?

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Answer: 300 pages are left to read.

Step-by-step explanation: There are 300 pages left to read, as 1/4 of 400 is 100. So far, Jane has read 100 pages.

I hope this helps!!

Answer: 300 pages

Step-by-step explanation: 1/4 of 400 is 100. 400-100=300. Thus, we arrive at our answer.

Hi! I’ll give brainliest to best answer!

Thanks so much in advance!

Answers

I believe the answer is 6!

D-6
(Use BODMAS/PENDMAS/BIDMAS)

PLEASE: Find The Ending Balence

1. $939 at 8% for 6 years

2. $823 at 3% for 9 years

3. $269 at 1# for 3 years

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Answer:

$450.72$222.21$8.07

Step-by-step explanation:

1: 450. 72
2: 222.21
3: 8.07

HELP ME ASAP!!!!!!!!!!!!!!!!

Answers

Answer:

Step-by-step explanation:

5x+ACB=180

A=33

2x+33 +ACB=180

This means 2x+33=5x

3x=33

x=11

X=11

We know that 5x + angle c=180
A=33 so therefore
2x+33+angle c=180
2x+33=5x
3x=33
X=11

Karl has 5 blue pencils, 3 yellow pencils and 2 black pencils. If Karl selects 2 pencils at random from his pencil case, without replacement, what is the probability that both pencils are not yellow?

Answers

In total you have 10 pencils but only 2 of them are yellow. Therefore when simplify this, the changes of not picking a yellow pencil is 8/10 which simplify to 4/5. There’s a 4/5 chance neither pencils will be yellow

The probability is 42/90 simplified to 7/15

Equation: probability of first non-yellow pencil x probability of second non-yellow pencil
7/10*6/9= 42/90= 7/15

There are 7 total pencils that are not yellow but because you don’t put the non-yellow pencil back there is a decrease in both the non-yellows and total pencils!

Ummm, Is this right
Mary brought 500ml of water to school, she drank 400ml herself,and shared the remaining am9unt of wayer equally among 4 friends. What amount of water did each friend drink?

Answers

Answer:

[tex]\huge\boxed{\sf 25\ ml}[/tex]

Step-by-step explanation:

Total amount of water = 500 ml

Mary drank = 400 ml

Left:

= 500 ml - 400 ml

= 100 ml

This was divided equally among 4 friends.

So,

Each friend got:

= 100 ml/4

= 25 ml

[tex]\rule[225]{225}{2}[/tex]

PLEASE HELP: What is the sales tax for each item?

Textbook: $20.00

Sales tax: 4%

Answers

Answer:

0.8

Step-by-step explanation:

The tax is calculated as the total price of the object multiplied by the amount of sales tax.

$20*4%=20*4/100=$4/5=$0.8

Heather is planning a dessert display. She needs 4 ounces of strawberries for each dessert.

Part A: Heather is not sure how many desserts she will make. Write an expression with a variable that represents the amount of strawberries Heather needs for the desserts. Identify what the variable represents.

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biscuits sweet strawberry

x= 4
X= the dessert
4= ounces per dessert

The equation 4x2 + 8x + 15 = 0 is being rewritten in vertex form.

Fill in the missing step.

Given 4x2 + 8x + 15 = 0

Step 1 4(x2 + 2x ___) + 15 ___ = 0

Step 2 blank

Step 3 4(x + 1)2 + 11 = 0

A:4(x2 + 2x + 1) + 15 − 4 = 0

B: 4(x2 + 2x + 1) + 15 − 1 = 0

c: 4(x2 + 2x + 2) + 15 − 2 = 0

D: 4(x2 + 2x + 4) + 15 − 4 = 0

Answers

D: 4(x2 + 2x + 4) + 15 − 4 = 0

The answer would be D:4(x2+2x+4)+15-4=0

PLEASE HURRY IM TIMED, The perimeter of a rectangular swimming pool is 70 yards. Its length is 25 yards. Which of the following can be used to find the width?
A.
width = (70 yd + 50 yd) ÷ 4
B.
width = (70 yd − 50 yd) ÷ 4
C.
width = (70 yd − 50 yd) ÷ 2
D.
width = (70 yd + 50 yd) ÷ 2

Answers

I thik the option C should be used.

Answer:

Step-by-step explanation:

There are 2 sides for length- 25+25=50

70-50=20. Divide that by 2 sides, 10 yards for width

Find the quotient. 5 1/4 - 15

a. 7/20
b. 78 3/4
c. 2 6/7
d. 3 1/4

Answers

What I find helps me with division is turning fractions into decimals. In this case 5 1/4 becomes 5.25 and 5.25/15 is .35 (equivalent to 7/20) Answer A: 7/20

The answer should be C- 2 6/7

I believe the question you are asking is what 5 1/4 (otherwise known as 5.25) divided into 15 is.

Simply put, your question is 15 divided by 5.25 (or 5 1/4)

To solve this we can make the fraction 5 1/4 into an improper fraction. This makes the fraction to consist of a numerator and a denominator and no whole numbers. Converting 5 wholes into fourths would mean 5 times 4 which is 20. Therefore 5 converted into 1/4 ‘s is 20 1/4’s. This combined with the other 1/4 in the fraction 5 1/4 makes the improper fraction 21/4.

When you divide fractions you switch the numerator and denominator of the fraction on one side (usually the right side although it doesn’t matter as long as you only switch one fraction of the two) and multiply. 15 times now 4/21 is 60/21.

To simplify this you can divide the numerator and denominator by a common factor. We can start with 3, simplifying the fraction to 20/7. Now as you may notice in the answer choices they are all mixed numbers, consisting of a whole number as well as the numerator and denominator. 20/7 as a mixed number is 2 6/7 as you can have 2 times 7 (14) and then have 6 left so you have 2 wholes and 6/7 away from another whole. This makes C the answer

Which of the following is a random sample of the population of people who subscribe to a particular magazine?

A) the first 20 names on the list of subscribers

B)the first name on the list of subscribers and every 10th person's name after that.

C) the list of subscribers separated into two groups, males and females, and the first 10 names from each group.

D) the 20th name on the list of subscribers and every 10th name after that

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Answer:

B is the answer of that question

I HOPE IT HELP YOU

The answer to the question is B)

John drew a trapezoid ABCD on a coordinate plane. The coordinates are as follows
A(8,4)
B(10,4)
C(13,-1)
D(8,-1)
What is the length of the side AD?

Answers

Answer: 5

Step-by-step explanation:

If the sides of A is (8,4) and the coordinates of D is (8-1), the same value in both coordinates are 8 and the different values are 4 (A) and -1 (D). We will take the absolute values (AV) of both when added: |4 + -1|.

The answer will be 5 grids (or whatever measurements the question uses).

The answer is 5 units because if you have a graph you can count from (8,4) to (8,-1) and it equals 5

PLEASE HELP ME ASAP!!!!!!

Answers

Answer:

Triangles are congruent due to SAS

Angles are congruent due to CPCTC

Step-by-step explanation:

In order to prove the congruency of the angles, we have to prove the congruency of the triangles.

ME=MR is given so that is a side

They share angle M so that is an angle

And, MA=MN which is given so that is a side.

The two triangles are congruent due to SAS postulate

So the angles are equal due to CPCTC

Angles E and R are congruent as they are the corresponding parts of two congruent triangle.

Given is a figure which shows two connected triangles ΔEMA and ΔRMN,

We need to prove ∠E ≅ ∠R.

Considering the triangles,

ME = MR [given]

MA = MN [given]

∠M is common angle in both triangles,

So, ΔEMA ≅ ΔRMN by SAS postulate.

So, ∠E ≅ ∠R by CPCTC.

Hence proved.

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how much will you have to pay back in total if you borrowed $400 from the bank for a year at 12%

Answers

1) figure out interest amount

400x.12= 48

2) add interest and loan amount

400+48= 448

You would have to pay back $448 in total after one year.

What is the amount on the loan?

The simple interest formula can be expressed as;

I = P × r × t

Where I is interest, P is principal, r is interest rate and t is time.

Given the parameters:

Principal P = $400 (the initial loan amount)

Rate r = 12% = 12/100 = 0.12

Time t = 1 year

Interest = ?

To determine the interest, we can use the above formula for simple interest:

I = P × r × t

Interest = $400 × 0.12 × 1

Interest = $48

Money to be paid back will be:

Amount = Principal + Interest

Amount = $400 + $48

Amount = $448

Therefore, the accrued amount to be paid is $448.

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What is the total amount due after 6 months on an initial loan of $1,400 at 12.5% annual interest.

Answers

Answer: $1487.50

Step-by-step explanation:

hey there again!

Facts:

Principal (starting amount): $1,400

Annual interest rate: 12.5% of the principal. Whenever you get an annual interest rate as a percentage, its always that percentage of the starting amount.

Time given: 6 months, 1/2 a year

the question asks "total amount due' in 6 months. Basically, we want to know how much they will have in their account after 6 months.

Step 1: Find how much interest he will get in 6 months as a percentage.

6 months is 1/2 of a year, so find 1/2 of 12.5

1/2 of 12.5

1/2 x 12.5

0.5 x 12.5

6.25%

Step 2: Find how much interest he gets, but as a number.

Principal: $1400

6.25% of 1400= $87.50

Step 3: Find the total amount of money he will have after 6 months.

he starts with 1400, and gets an additional $87.50 added to his account after 6 months. How much does he have now?

To answer this, add to find the total:

87.50+1400= $1487.50

The answer is 1487.50 :)

HELP ASAP!!!!!!!!!!!!!!!!

Answers

Answer:

Step-by-step explanation:

angle RQS=180-90-34=90-34=56

and then

180-56=x+72

124=x+72

x=52

Therefore, based on the exterior angle theorem, the value of x is: 52

A local gym sells monthly memberships. The function f(x) = −x2 + 18x − 72 models the daily profit in dollars, where x is the number of memberships sold.

Determine the zeros, and explain what these values mean in the context of the problem.

x = 9, x = 18; The zeros represent the number of monthly memberships that produces a maximum profit.
x = 9, x = 18; The zeros represent the number of monthly memberships when no profit is made.
x = 6, x = 12; The zeros represent the number of monthly memberships that produces a maximum profit.
x = 6, x = 12; The zeros represent the number of monthly memberships when no profit is made.

Answers

Answer: the zeros are at (6,0) and (12,0) where no profit is made.

option D

Step-by-step explanation: you can find the zeros ( the x-intercepts), by either graphing out the function or factoring it.

in this scenario, there is no y increase, which means 0 profit.

no profit was made the correct answer is D

In a regular 52 deck of cards, what is the probability of picking a random spade, a 4 of any suit and then a random diamond with replacement?

Answers

[tex]sample \: space = 52 \: cards \\ spades = 13 \: cards \\ number \: 4s = 4 \: cards \\ diamonds = 13 \: cards \\ note \: that = \\ there \: is \: replacement \\ order \: does \: matter[/tex]

[tex]P( \gamma ) = \frac{13}{52} \times \frac{4}{52} \times \frac{13}{52} = \frac{1}{208} [/tex]

The Answer is 1/208

Other Questions

Show your work The answer is, "3 hours", But you need to show your work to back this answer up.

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Show your work
The answer is, "3 hours", But you need to show your work to back this answer up.