Problema Solution
When you buy 18 cookies at the regular price, you receive 3 more cookies for only 6 cents each. If 21 cookies cost $8.82 at the sale, what is the regular price of 1 cookie?
Answer provided by our tutors
21 cookies is 18 cookies + the 3 for 6 cents each. So subtract 6 cents three times, or subtract 18 cents first.
8.82-.18 = 8.64 This is the price of 18 cookies, since we subtracted the 18 cents that the extra three on sale cost. Therefore, divide this by 18.
8.64/18 = .48
Therefore, each cookie costs 48 cents.