2 years ago

3 2/5 miles in 7/8 hour. What is his average speed in miles per hour?

1 answer:

Archy [21]2 years ago

6 0

About 4 miles per hour

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kiruha [24]

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dexar [7]

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1/5 . 950

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Naya [18.7K]

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Nitella [24]

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2 years ago

GalinKa [24]

The fromula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

a) (-1, -8), (-7, -4)

substitute

$m=\dfrac{-4-(-8)}{-7-(-1)}=\dfrac{-4+8}{-7+1}=\dfrac{4}{-6}=-\dfrac{2}{3}$

b) (2.1, 3.8), (3.1, 7.6)

substitute

$m=\dfrac{7.6-3.8}{3.1-2.1}=\dfrac{3.8}{1}=3.8$

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2 years ago