Spencer bought 3 books of stamps and mailed a package. It cost $4.50 to mail the package. How do you define a variable and write an expression to represent the total amount he spent at the post office?
1 Answer
Jun 23, 2016
Cost =
Explanation:
We do not know the cost of each book of stamps, but whatever it was, Spencer bought 3 of them.
Let's call the value we don't know,
The money spent on the books of stamps is:
He also spent money mailing the package, but that amount we do know.
His total cost is therefore the money spent on the books as well on the mailing.
Cost =
This is an expression which we cannot simplify.
