Question

Dana bought 12 pizzas for a Math Club party. Some were pepperoni pizzas that $11.00 each,

and the rest were mushroom pizzas that cost $9.50 each. She paid $124.50 for the pizzas. How
many pepperoni pizzas did she buy

Answer 1

7 pepperoni pizzas

Explanation:

Where p = # of pepperoni pizzas and m = # of mushroom pizzas

124.50 = 11p + 9.5m

Now you need to guess and check:

Use this equation: (124.5 - 11 * p) / 9.5 and replace p with whole numbers until you get a whole number as the output

I got p=7 and m=5

So she bought 7 pepperoni pizzas

Answer 2

7 pepperoni pizzas

Explanation:

First, you take the biggest number and subtract it by 9.5 until you get a number that can be divided into 11 which is 77.