Jethro walked 3 miles per hour for 2 hours. So you would want to do 3 x 2. That equaling 6. So Jethro walked a total of 6 miles in two hours. Randy walked 4 miles per hour for 3 hours. So you would want to do 4 x 3. That equaling 12. So Randy walked a total 12 miles in three hours. If you add 6 miles and 12 miles the boys would have walked a total of 18 miles together. Hope you do good. Have a Tessariffic day. Mark Me Brainiest Please. Tessadog Out