a store is offering a 20% discount off one item. you also have a coupon for 5$ off one item. Which composite function repressents the fina price if the coupon is applied before the discount

See below.

Step-by-step explanation:

If the original price is $p then final price is calculated as follows:

We start with p - 5 because the coupon was applied before the discount.

Final price = $ (p - 5) - 0.2 (p - 5)

= p - 5 - 0.2p + 1

= $ (0.8p - 4).