Determain whether the ratios are equivalent. show work. "11 out of 14 students biked to school, 22 out of 28 students biked to school " i need

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