Bob made salad with 2 3/8 pounds of tomatoes,1 1/4 pounds of lettuce , and 2 7/8 pounds of potatoes. how many pounds of vegetables to do use to use altogether .

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.