Clara bought a shirt for %18.45 and a skirt for $22.68. She gave the cashier $50 for the purchase. How much change will clara receive?

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