The final cost of a bookstore purchase with a $5 coupon in a state that charges 8% sales tax is given by this expression. The va
riable x represents the amount of the purchase before the sales tax and the coupon are applied. 1.08(x−5) What does (x−5) represent? a. the total charge after tax b. the rate at which the total cost increases c. the total charge before applying sales tax d. the cost before applying the coupon
