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Lisa [10]
3 years ago
11

Thank you for your help!

Mathematics
1 answer:
Tomtit [17]3 years ago
6 0

Answer:

the 3 rd one is what I would go with

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If a wheelchair-marathon racer moving at 13.1 miles per hour expends energy at a rate of 645 calories per hour, how much energy
Anna71 [15]

Answer:

1290 calories

Step-by-step explanation:

Given: The racer moves at 13.1 miles per hour expends energy at a rate of 645 calories per hour.

To find: Energy in calories, required to complete a marathon race 26.2 miles at this pace.

Solution: We have,

The racer moves at 13.1 miles per hour.

The racer expends energy at a rate of 645 calories per hour.

So, energy expended while moving 13.1 miles =645 calories.

Now, energy expended while moving 1 mile =\frac{645}{13.1} calories.

So, energy expended while moving 26.2 miles =\frac{645}{13.1}\times 26.2=645\times 2=1290 calories.

Hence, 1290 calories of energy is required to complete a marathon race 26.2 miles at this pace.

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3 years ago
which function is the inverse of f(x)=2x+3
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Answer:

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Step-by-step explanation:

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4 0
3 years ago
Solve the following system of equations 3x+4y=16 and -4x-3y = -19
BigorU [14]
3x + 4y = 16
-4x - 3y = -19

4( 3x + 4y = 16)
3( -4x - 3y = -19)
Distribute
12x + 16y = 64
-12x - 9y = -57
Now subtract both equations
7y = 7
/7 on both sides
y = 1

Substitute y = 1 in one of the equations.
3x + 4y = 16
3x + 4(1) = 16
-4 on both sides
3x = 12
/3 on both sides
x = 4

Answer:
x = 4
y = 1
4 0
2 years ago
What is 6,691 ÷ 28 <br><br>step by step <br><br>without a decimal​
steposvetlana [31]

Answer:

238

Step-by-step explanation:

238.964286

6 0
2 years ago
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• William Shakespeare died on his birthday at
saveliy_v [14]

Answer:

C

Step-by-step explanation:

6 0
2 years ago
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