Question #56688

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Answer 1 · 2016-12-07T13:48:21

Assuming running velocity is constant.

She can run 7 miles in 1 hour

Let the velocity (speed) in miles per hour be: $" "v" mph"$

$" "$ velocity x time = distance

$" "=>vxx1/8=7/8" miles"$

Multiply both sides by $color(red)(8)$

$" "color(green)(vxx color(red)(8xx)1/8" "=" "7/8color(red)(xx8))$

$" "vxx8/8" "=" "7xx8/8$

But $8/8=1$

$" "vxx1=7xx1$

$" "v=7" mph"$