How many square yards of carpet are needed to cover the floor of a room that is 15 feet long and 12 feet wide? (1 yd = 3 ft)

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work