Atruck travels 75 mi in the time that a car travels 100 mi. the car is traveling at 15 mph faster than the truck. what is the speed of the car? assume that both drives start at the same time. i need a answer

i could be wrong, i v v tired, it sounds like addition. the car is going 90mph

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right