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And show work.

 

 Sep 4, 2020
 #1
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First lets denote x to be how much mph he runs and 2x to be how much mph he bikes. We construct the following equation:

20/2x+10/x=2.5

10/x+10/x=2.5

10/x=1.25

x=10/1.25

x=8miles per hour

So there for his biking speed will be 2x=2*8=16miles per hour and his running speed will be 8 miles per hour.

 Sep 4, 2020

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