Rewrite the equation so that d equals a single fraction

Question

the braking distance of a car can be modeled by s=s+s^2/20 where d is the distance (in feet) that the car travels before coming to a stop, and s is the speed at which a car is traveling(in miles per hour)

Answer 1

Assuming:

d = s + s²/20

d = 20s/20 + s²/20          LCD

d = (s² + 20s) / 20           Add