4 years ago

She runs for 17.5 miles at a speed of 7 miles per hour .for how many hours does she run?

1 answer:

6 0

- It's a distance,time, rate question
- And this question asks for the time, which is distance over rate or speed.
- That is 17.5 divided by 7, the answer will be the amount of hours she runs for...

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Svetlanka [38]

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3 years ago

Two classrooms have a total of 45 people in them. The first class is a math class with 5 more students that the science class. H

Basile [38]

Answer:

20 students in science class, 25 in math

Step-by-step explanation:

so let 1 classroom= x

so the other classroom= x+5

if there is a total of 45 students

x+x+5=45

2x=45-5

2x=40

x=20

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3 years ago

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A first number plus twice a second number is 11. Twice the first number plus the second totals 31 find the numbers

Serhud [2]

X + 2y = 11
2x + y = 31

x = 11 - 2y

2(11 - 2y) + y = 31
22 - 4y + y = 31
3y = - 9
y = - 3

x = 11 - 2(-3)
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4 years ago

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romanna [79]

Answer: 3.5"

64:80::2.8":x

$\frac{64}{80}$ $\frac{2.8}{x}$

2.8x80=224

224/64=3.5"

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3 years ago

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1/4+(-3/4)= ?<br>(Sorry I didn't have a calculator)

IrinaVladis [17]

The answer would be
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or in decimal form
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3 0

3 years ago