Answer:
4n - 3
Step-by-step explanation:

OK so for the first one, you have 3 TVs for 1200 dollars. The 90 dollars is a 1 time cost. so what u want to do is multiply 3 by 1200 and then add 90.
Answer:
1944
Step-by-step explanation:
I'm probably wrong but that is my answer
Answer:
1
Step-by-step explanation:
Okay, so I know that you either multiply the volume of a cone by 3 to get the cylinders volume, or you divide it. I think you multiply it. Just remember, the rule is to multiply the volume of a cone by 3, to get the cylinder volume with the same measurements. So 15 x 3.