Answer: In the Instance that she downloads 45 songs, she would pay $40.75. The equation for s songs in one month would be
Money = 7 + s(0.75)
Well, since the time span is a month we can say M is money and n is the amount of months she listens. since this is one month we know N equals 1.
So M = 7n + s(0.75)
7 being the monthly fee, n being the amount of months using the service, s being the amount of songs downloaded, and 0.75 being the cost of every song downloaded.
Explanation: