A printing service charges a set-up fee of $12.50 for each order and 7 cents more for each copy. The total cost, C (in dollars), for an order of x copies is given

by the following.

C = 0.07x+12.50

What is the total cost for an order of 20 copies?

___ dollars

Answer: the total cost for an order of 20 copies is $13.9

Step-by-step explanation:

Let x represent the number of copies ordered.

The printing service charges a set-up fee of $12.50 for each order and 7 cents more for each copy.

The equation representing the total cost, C (in dollars), for an order of x copies is expressed as

C = 0.07x + 12.50

Therefore, the total cost for an order of 20 copies would be

C = 0.07 * 20 + 12.5

C = 1.4 + 12.5

C = 13.9 dollars