Question

A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 140 lb and each box of books weighs 50 lb. The maximum capacity of the elevator is 830 lb. How many boxes of books can the delivery person bring up at one time?

Answer 1

We can model this with the following inequality

50x + 160 ≤ 1000 where x is the number of boxes....so, subtracting 160 from each side, we have

50x ≤ 840 divide both sides by 50

x ≤ 16.8 boxes ....but since he can't bring up partial boxes, round down to 16