The distances (y), in miles, of two cars from their starting points at certain times (x), in hours, are shown by the equations below: car a: y = 52x + 70 car b: y = 54x + 56 after how many hours will the two cars be at the same distance from their starting point and what will that distance be? 6 hours, 420 miles 6 hours, 434 miles 7 hours, 420 miles 7 hours, 434 miles