Astore is having a sale. sally wants to buy an $80 item at the store. which of the following equations gives the discount price, y, in dollars, of the $80 item after a discount of x percent? a. y = 80 + 0.8 x b. y = 80 – 1.25 x c. y = 80 + 1.25 x d. y = 80 – 0.8 x