Today, everything at a store is on sale. The store offers a 20% discount.
a. The regular price of a T-shirt is $18. What is the discount price?
Type the answer in the box below.
$
b. If the regular price of an item is x dollars, what is the discount price in dollars?
Type the correct expression in the box below.
$$
c. The discount price of a hat is $18. What is the regular price?
Type the answer in the box below.
$