A car company tested a sports car on a road with different inclines. The test driver tested the car by driving a distance of x miles on a flat road, (x2 3) miles downhill, and (x β 7) miles uphill. Which simplified expression is equivalent to the total distance, in miles, for which the car was tested? 3x2 β 4 3x2 10 x2 2x β 4 x2 2x 10.
