Which step did the student make and error in solving the equation?(step numbers in circled in blue font)
A.2
B.3
C.5
D.No mistake

Answer:

[tex]y=13\text{ miles per gallon}[/tex]

Step-by-step explanation:

We have the two points: (0, 11) and (3, 50).

And we want to find the rate of change in y relative to x, where x is the gallons and y is the miles.

In simple terms, we want to find the slope between the two points.

So, let's use the slope formula:

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

Let (0, 11) be (x₁, y₁) and let (3, 50) be (x₂, y₂). Substitute. Let's also put "miles" in the numerator with the Ys and "gallons" in the denominator with the Xs. This yields:

[tex]y=\frac{50-11\text{ miles}}{3-0\text{ gallons}}[/tex]

Subtract and reduce:

[tex]y=39\text{ miles}/3\text{ gallons}=13\text{ miles per gallon}[/tex]

And we're done!

Answer:

Two slices cost $2.20, 10 slices cost $11, and half a slice costs $0.55

Step-by-step explanation:

First, find the cost of one slice, by dividing 5.50 by 5

5.50/5

= 1.10

Then, multiply this by 2, 10, and 1/2, to find the cost of those numbers of slices.

1.10(2)

= 2.20

1.10(10)

= 11

1.10(1/2)

= 0.55

So, two slices cost $2.20, 10 slices cost $11, and half a slice costs $0.55

Answer:

see below

Step-by-step explanation:

First find the unit rate

$5.50 / 5 slices = $1.10 per slice

2 slices

$1.10 *2 = $2.20

10 slices

$1.10 *10 = $11.00

1/2 slice

$1.10 *.5 = $0.55

Answer:

2 25/100

Step-by-step explanation:

Answer:

5 movies

Step-by-step explanation:

Let x denotes number of movies that need to be ready each month for the total fees to be the same from either company.

Monthly membership fee charged by a video store = $7.50

Amount charged to rent each movie = $1.00

So,

total amount charged by the first store = [tex]7.50+(1)x=7.50+x[/tex]

Monthly membership fee charged by another video store = $0

Amount charged to rent each movie = $2.50

So,

total amount charged by another store = [tex]0+2.50(x)=2.50x[/tex]

To find number of movies that need to be ready each month for the total fees to be the same from either company,

solve [tex]7.50+x=2.50x[/tex]

[tex]7.50+x=2.50x\\7.50=2.50x-x\\7.50=1.50x\\x=\frac{7.50}{1.50}\\ =5[/tex]

Answer:

D

Step-by-step explanation:

I am pretty sure it is D because it looks like there are 24 edges (8 + 8 + 8)

Answer:

the answer is D trust is D

Answer: B

Step-by-step explanation:

To get no solution you need to have 2 sides of the equations that don't match. If you go through B you will end up getting 3x- (11/7)=3x-2 which is not true.

Answer:

64

Step-by-step explanation:

Its practically just 8 times 8

Answer:

2

Step-by-step explanation:

subtract 3 from the 3 and 3 from 11 which would give you 8 then you would divide the 4 from 4a which would leave you with just a and then divided 4 by 8which would give you 2 so its a=2

Answer:

6/7 = y

Step-by-step explanation:

-3=7(y-9/7)

Distribute

-3= 7*y - 7*9/7

-3 = 7y - 9

Add 9 to each side

-3+9 = 7y -9+9

6 = 7y

Divide each side by 7

6/7 = 7y/7

6/7 = y

Answer:

Step-by-step explanation:

Refer to attached

With a corner removed, it doesn't change surface area of the cube as same area is exposed equal to the area of 3 small faces.

With the corner relocated to the top of the cube, it covers the area of one small face but adds up small 5 faces (4 sides and one top). In total the P has more surface area than the Q.

Correct answer choice is C.

Answer:

A

Step-by-step explanation:

It is A because it is very precise and it can make a bar graph.

Answer: Choice A) You ask 20 people what their favorite season is.

Choices B and C are best represented with a line graph to show the growth over time.

A bar graph is useful to see how many categories get a certain response. In the case of choice A, we have four categories for each season. The height of each bar represents how many responses were made for that given category.

y + 82 = 10x is the answer.

Answer:

y+72 = 10(x-1)

Step-by-step explanation:

I don't really know why this would be useful for solving a problem; please tell me in the comments of my answer.

Anyway, I would pick a random point that would satisfy this equation. One example would be (1, -72)

Now just plug those 2 numbers into the equation:

y+72 = 10(x-1)

Answer:

the answers are

1

3

4

Step-by-step explanation:

i just took the test

Answer:

1 3 4

Step-by-step explanation:

Answer:

the value of X is 13..

Thank you ☺️

Answer:

the value of X is 13..

Step-by-step explanation:

Answer:

65 marbles

Step-by-step explanation:

2:6 = x-20:x using the information in the problem

2x = 6x-120, and therefore x = 30. 30 is the number of green marbles.

We can find that the multiplier is 30/6 = 5. So there will be 5*2 = 10 red marbles. 5*5 = 25 blue marbles.

30+10+25 = 65 marbles total.

Answer:

176

Step-by-step explanation:

54×8=432

8×4=32

32×8=256

432-256=176

Answer:

-38y-21z

Step-by-step explanation:

-2(3y+z)-7z-4(3z+8y) is the same as

-6y-2z-7z-12z-32y which is the same as

-38y-21z Which is in simplest form

Answer:

-21z-38y

Step-by-step explanation:

hope it helps :)

Answer:

Subtraction

Step-by-step explanation:

Subtraction.

11x + 3 = 3

We need to isolate x.

Therefore, we have to move anything unrelated to the other side first.

Then, we can take the things directly affecting x off first.

-3 comes first, then divide by 11.

11x + 3 = 3

      - 3    - 3

11x = 0

x = 0

Answer:

The answer is subtraction.

Step-by-step explanation:

Answer:

A- Confident

Answer: D. intelligent

Answer:15

Step-by-step explanation:

Answer:

r = 1/2(s -t/x)

Step-by-step explanation:

Here, we simply want to make r the subject of the formula;

We proceed as follows;

s = 2r + t/x

s - t/x = 2r

Divide both sides by 2

r = 1/2(s - t/x)

Answer: 57.02

130.3 - 73.28 = 57.02

Answer:

my best guess is A but im not 100% sure

Step-by-step explanation:

Answer:

5 times

Step-by-step explanation:

Answer:

5 times

Step-by-step explanation:

So this is called division. To solve this you can either use a calculator, or you can use something called guess and check. Guess and check is what it sounds like, guessing and checking to see if it's correct or not.

The way I would solve it is just do 100/20 which equals 5. You can also just add 20 a certain amount of times. For example you could do 20 + 20 + 20 + 20 which equals 80. So that means you can add another 20 to equal 100

Answer:

20

Step-by-step explanation:

Hope This Helps!

Plz Mark Brainliest!

Answer:

100 ft.

Explanation:

To find an area, you have to multiply the length/width of every side. Meaning you just have to do simple multiplication, which is:

20x4= 80

200x4= 800

100x4= 200

25x4= 100

As you can see, it is 100.

Answer:

1. f > 40 miles/gallon

2. t < 35 degrees

Answer:

For part one the vehicle cannot have less than 40mpg so the equality would be

[tex]f\geq 40mpg[/tex] because the mpg must be greater than or equal to 40mpg.

For part two the temp must be LESS than 35 not including 35.

so we would show that with [tex]t<35F[/tex]

Answer:

how many does it have left noob

Answer:

The first one is 30

Step-by-step explanation: