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Mathematics 24 Online
OpenStudy (ebonyserrano):

A long distance runner starts at the beginning of a trail and runs at a rate of 4 miles per hour. One hour later, a cyclist starts at the beginning of the trail and travels at a rate of 20 miles per hour. What is the amount of time that the cyclist travels before overtaking the runner? Do not do any rounding.

OpenStudy (ebonyserrano):

how many hours?

OpenStudy (ebonyserrano):

@Will.H

OpenStudy (tkhunny):

Can you write an expression for the distance traveled by the runner? Can you write an expression for the distance traveled by the bicyclist?

OpenStudy (ebonyserrano):

no and no

OpenStudy (ebonyserrano):

idk how

OpenStudy (tkhunny):

I do not believe that. H is the number of hours we seek. Please use that to write and expression for the runner.

OpenStudy (ebonyserrano):

h +20=x

OpenStudy (tkhunny):

The runner travels at 4 miles per hour for exactly H hours. How far is that?

OpenStudy (ebonyserrano):

4+h=20?

OpenStudy (tkhunny):

A car travels at 40 miles per hour for exactly 2 hours. How far is that?

OpenStudy (ebonyserrano):

80

OpenStudy (tkhunny):

How did you determine that? 40 mph * 2 hrs = 80 miles. Notice how you used multiplication. Please try again. The runner travels at 4 miles per hour for exactly H hours. How far is that?

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