Question

Marina can bicycle 19.5 miles in the same time it takes her to run 6 miles. She bikes 9 miles per hour faster than she runs. At what speed does Marina run? Distance Rate Time Bicycling 19.5 mc016-1.jpg mc016-2.jpg Running 6 r mc016-3.jpg

Answer 1

4 mph

Explanation:

Answer 2

Running Speed = x
Cycling Speed = x + 9
19.5/x + 9 = 6/x
Cross multiply
19.5x = 6x + 54

19.5x - 6x = 54
13.5x = 54
x = 4
she runs 4 mph