If p(2,1) and q(6,1) are the end points of the base of isosceles right triangle , what is the x coordinate of the third vertex

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