Question

Dave can bike his exercise route an hour and half faster than he can walk it. his biking speed is 9 mph faster than his walking speed. if his route is 6 miles long an equation that can be used to find his walking speed. what is dabbed walking speed.

Answer 1

walking = biking + 1.5 hour

biking speed = 9 mph + walking speed

route = 6 miles

6/w = 6/(w + 9) - 3/2

Solving for w:

108 = -3w^2 - 27w ==> 3w^2 + 27w + 108 = 0 ==> x^2 + 9x + 36 = 0