A cell phone provider offers a plan that costs $40 per month plus $0.10 per text message sent or received. A comparable plan costs $60 per month but offers unlimited text messaging. Complete parts a. and b. below.

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?