Question

A company produces and sells CDs. There is a fixed cost of $2000 and $5 per CD manufactured. The manufacturer sells each CD for $10, write a system of equations that describes the situation.

Answer 1

Call the production cost 'C', the revenue 'R' and the number of CDs 'n': 

C=2000+5n
R=10n
By definition Profit P = R-C, therefore P=10n-2000+5n = 5n-2000.