HELP Without using a calculator, match each expression to the correct point.

Can someone me out here and the tell me the greatest common factor

How do i simply this radical expression?

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