Question

C= 12r + 2
what is C?
What is r?

Answer 1

Unless there is some context behind it, with a picture or something here you are.

Explanation:

C=12r+2

So, we have to find out what it could be.

You can plug in anything for r, so I'll make it easy.

r=1

C=12*(1)+2

12*1=12+2=14

C=14.