Question: When a car is moving at x miles per hour and the driver decides to slam on the brakes, the car will travel x +

When a car is moving at x miles per hour and the driver decides to slam on the brakes, the car will travel x + 1/20 x² 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?

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