Amarble is drawn at random from a bag containing 2 blue marbles, 3 yellow marbles, and 7 orange marbles. what is the probability that the marble is not yellow and not blue?

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