Question

Set up the following system: Microsoft office has a $20 purchase fee and costs $10 per month. It’s competitor Chaffey Office has a 10$ purchase fee and costs 12$ per month. Let Microsoft office be c(m). Use m to represent the Number of months.

Answer 1

Well, let's say you want to see how much it would cost to have Microsoft vs. Chaffey for a year. The equation for Microsoft would be: 
20 + 10m 
Chaffey would be: 
10 + 12m 
You would put 12 into m (12 months in a year) for both equations and find that it would be more expensive to have Chaffey for a year.