Velocity When a car is moving at x miles per hour and the driver decides to slam on the br...

Velocity When a car is moving at x miles per hour and the driver decides to slam on the brakes, the car will travel x +  feet. (The general formula is f(x) = ax + bx2 , where the constant a depends on the driver’s reaction time and the constant b depends on the weight of the car and the type of tires.) If a car travels 175 feet after the driver decides to stop, how fast was the car moving?