Question

a delivery person uses a service elevator to bring boxes of books up to an office the delivery person weighs 170 lb and each box of books weighs 40 pounds the maximum of the elevator is 920 lb how many boxes of books can the delivery person bring up at one time

Answer 1

a delivery person uses a service elevator to bring boxes of books up to an office the delivery person weighs 170 lb and each box of books weighs 40 pounds the maximum of the elevator is 920 lb how many boxes of books can the delivery person bring up at one time​

we have

Let

x -----> the number of boxes

so

`170+40x\leq920`

solve the inequality for x

`\begin{gathered} 40x\leq920-170 \\ 40x\leq750 \\ x\leq18.75 \end{gathered}`

therefore

the maximum number of boxes is 18