Final answer:
Matt was driving at a speed of 59 miles per hour.
Step-by-step explanation:
To find the speed at which Matt was driving, divide the distance he drove by the time it took him. In this case, Matt drove 415 miles in 7 hours. Divide 415 by 7 to get 59.28 miles per hour. Round this to the nearest mile per hour, which is 59 mph. Therefore, Matt was driving at a speed of 59 miles per hour.