Question

Clarissa bought 3 cartons of milk for y cents each she gave the cashier $10. How much change did she receive? Express your answer in terms of y.

Answer 1

The amount of change she received was
`(10-0.03y)` dollar.

Explanation:

Price of each carton of milk is
`y` cents and she bought 3 cartons of milk.

We know that, 1 dollar = 100 cents

So, 1 cent =
`(1)/(100)=0.01` dollar.

and
`y` cents
`=0.01y` dollar.

Thus, the total price of 3 cartons of milk
`=(0.01y*3)=0.03y` dollar.

She gave the cashier $10.

So, the amount of change she received
`=(10-0.03y)` dollar.