Answer:
Each postcard cost $0.79
Step-by-step explanation:
Craig bought various items at a particular price let us represent the items as follows:
pair of sunglasses = $15.98
Hat = $7.99
Let the price of each postcard = a
Total price of 5 postcards =$5a
Beach towel = 0.50 + 1/2 × 15.98 = $8.49
He gave the cashier $40 and got a change of $3.59. That means he paid 40-3.59 = $36.41 for the whole goods he bought.
Total amount of goods bought can be computed as
15.98 + 7.99 + 5a + 8.49 = 36.41
32.46 + 5a = 36.41
5a = 36.41 - 32.46
5a = 3.95
divide both side by 5
a = 3.95/5
a = 0.79
Each postcard cost $0.79
