Question

. An online book company charges a shipping fee of $12. Books cost $4.50 each. Write an expression for the cost of ordering any number of books from this company.

Answer 1

Shipping fee: $12

Cost of each book: $4.50

Number of books: x

The cost of ordering any number of books must be equal to the product of the cost of each book (4.50) and the number of books (x), plus the shipping fee (12):

4.50x+12