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3 years ago

I need help :). Can anyone solve this or send me the answers?! The test is #7 adding and subtracting rationals 7th grade

Mathematics

1 answer:

horsena [70]3 years ago

5 0

Answer:

0.625

Step-by-step explanation:

5/8 is 0.625 and you ate 5 eighths of the total

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7(13 - 2x) - 9(x + 10)

jeka57 [31]

Answer:

-23x+1

Step-by-step explanation:

91-14x - (9x+90)

91-14x-9x-90

-23x+1

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3 years ago

Read 2 more answers

What is the ratio of the volume of a cube with edge length six inches to the volume of a cube with edge length one foot? Express

gladu [14]

Answer:

The ratio is $\frac{1}{8}$

Step-by-step explanation:

The volume of a cube with edge length a is:

$V = a^{3}$

We have two cubes:

Cube 1: The one with edge length of six inches.

Cubs 2: The one with edge length of one foot.

The ratio is:

$R = \frac{V_{C1}}{V_{C2}}$

In which $V_{C1}$ is the volume of the first cube and $V_{C2}$ is the volume of the second cube.

Volume of the first cube

The edge length is 6 inches, so $a = 6$ .

$V_{C1} = 6^{3} = 216 inches^{3}$

Volume of the second cube

To express the ratio as a common fraction, both volumes must be in the same unit. So we must pass the edge length of the second cube to inches.

The second cube has edge length of one foot. Each foot has twelve inches. So

$V_{C2} = 12^{3} = 1720 inches^{3}$

Ratio:

$R = \frac{V_{C1}}{V_{C2}} = \frac{216}{1720} = \frac{1}{8}$

3 0

2 years ago

It takes Niamh 3 hours to drive from Ashdown to Bridgeton at an average speed of 50 mph.

Nadya [2.5K]

Answer:

46.7

Step-by-step explanation:

3 × 50 = 150 miles

60 ÷ 40 = 1.5 h.

(150 + 60) ÷ (1.5 + 3) = 46.7 mph

(Speed × Time = Distance)

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2 years ago

What is the answer to this?

olasank [31]

Answer:

Step-by-step explanation:

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3 years ago

Please find the area of the trapezoids:

mamaluj [8]

Answer: A = 5 square units. hope this helps you!

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3 years ago