Question

Sheila is ordering pizzas for a party. Each plain pizza costs $9.00, and each topping costs $1.50. The delivery charge is $3.00. Write a function rule to show the total cost of the pizzas if the pizza ordered has 2 toppings. How much will 5 pizzas cost? A. c = 15p; $75.00 B. c = 12 + 3p; $27.00 C. c = 3 + 12p; $63.00 D. c = 6 + 10.5p; $58.50

Answer 1

c = 3 + 12p; $63.00

Explanation:

If each plain pizza costs $9.00, and each topping costs $1.50, the total cost of one pizza plus 2 toppings will be $9.00+$1.50(2) = $12.00

let p be the total number of pizzas bought

The total cost of p pizzas will be expressed as

c = $12.00p + $3.00

$3.00 is the delivery charge (Note that the delivery charge is the same for any amount of pizzas bought)

Next is to get the cost of 5 pizzas, we will substitute p = 5 into the expression given as shown;

c = $12.00p + $3.00

c = $12.00(5) + $3.00

c = $60 + $3.00

c = $63.00

Hence 5 pizzas will cost $63.