Irene R. answered • 06/10/20

BS in Mechanical Engineering and Certified math teacher for 13 years

Hi Gian,

The cost, C , can be determined by multiplying the number of toppings (t ) ordered by $2.15 and adding on the basic price, b.

C = 2.15 • t + b

You can use the information provided about the 3-topping pizza to find the basic cost first.

$13.25 = 2.15 • 3 + b

13.25 = 6.45 + b

13.25 - 6.45 = 6.45 + b - 6.45

$6.80 = b

The basic price for any pizza ordered is $6.80

Now we can write the following equation that could be used to find the cost of any pizza ordered:

C = $2.15 • t + $6.80

Hope this helps Gian. Let me know if you have more questions or would like to schedule a learning session.

Mrs. R.