Translate this sentence into an algebraic equation. 7 less than y is 9.
A) y = 9-7
B) 7- y = 9
C) 7 = 9 - y
D) y - 7 = 9

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?