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stiks02 [169]
3 years ago
10

Mary leaves her house to take a walk. The graph shows the distance, d, in feet from

Mathematics
1 answer:
andrew-mc [135]3 years ago
7 0
D. 35, since that would be the longest amount. of time walking away from her house, she should be the farthest amount of feet away from her house
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Answer:

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Step-by-step explanation:

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distance = speed * time

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48 - d = 2s * 2

d + 4s = 48   Equation 1

Second part of the trip:

d = s * 2

d = 2s    Equation 2

Equations 1 and 2 form a system of equations in two unknowns, d and s.

d + 4s = 48

d = 2s

Substitute 2s for d in equation 1.

2s + 4s = 48

6s = 48

s = 8

The speed in the second part is 8 mph.

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The speed in the first part is 16 mph.

Check:

d = 2s = 2(8) = 16

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The second part is 16 miles. The first part is 32 miles.

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Our answer is correct.

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3 years ago
Is this graph linear or exponential
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