Why do circular pizzas come in square boxes?

It is much cheaper to mass produce square boxes than round ones since a square box can be made from a single sheet of cardboard. Square boxes are also much easier to store since they can remain flat until needed.

Step-by-step explanation:

:)

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.