a delivery person uses a service elevator to bring boxes of books up to an office. the delivery person weighs 160 lb and each box of books weighs 50 lb. the maximum capacity of the elevator is 1400 lb. how many boxes can the delivery person bring up at one time?

He can carry around 6 boxes. How? So add one box of books and himself. You should get 210 lb. Afterwards, do 1,400 lb / 210 lb, since the max capacity of the elevator is 1,400 lb. You will get 6.666 and repeating. It will only be 6 boxes at one time. Do NOT round the decimal. The elevator will not be able to take 7 boxes PLUS himself. Otherwise the elevator will crash and fall. Hope this helped!