> > 'The formula for calculating the breaking distance needed when traveling at a certain speed is d=x^2/20 + x, where x is the speed of the car and d is the stopping distance.

# 'The formula for calculating the breaking distance needed when traveling at a certain speed is d=x^2/20 + x, where x is the speed of the car and d is the stopping distance.

## Calculate the stopping distance required when a car traveling 20 mp...

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### 'The formula for calculating the breaking distance needed when traveling at a certain speed is d=x^2/20 + x, where x is the speed of the car and d is the stopping distance.

Calculate the stopping distance required when a car traveling 20 mph, 40 mph, 60 mph, and 60 mph.
My answers are not coming up correct.
Can you explain each step in this problem so I can see what I am doing wrong?'

D = x^2/20 + x The square of x needs to be calculated before dividing by 20.
So for 40 D = 40^2 / 20 + 40 D = 1600 / 20 + 40 D = 800 + 40 D = 840 However, the results do not match the stopping distance data for cars, so I suspect that there are errors in the formula or they are stopping distances for a another vehicle.

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This 74 words question was answered by John B. on StudySoup on 5/31/2017. The question contains content related to Math Since its upload, it has received 132 views.