Need algebra help to solve a distance, rate and time problem using a system of linear equations

Algebra
Tutor: None Selected Time limit: 1 Day

A child is running on a moving sidewalk in an airport.  When he runs against the sidewalk's motion, he travels 72ft in 12 seconds.  When he runs with the sidewalk's motion, he travels 80ft in 10 seconds.  What is the rate of the child on a still sidewalk and what is the rate of the moving sidewalk?

Nov 15th, 2015

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Answer:

7 ft/s rate of the child on a still sidewalk

1 ft/s  rate of the moving sidewalk

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Nov 15th, 2015

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