Answer:
Ci = x
Cs = 5 + 0.5x
Explanation:
The site itoons costs $1 per song with no montly fee, so the cost can be expressed as
Ci = 1.x = x
Where x is the number of songs Wendell will download
The site song-R-Us.com charges $5 a month and $0.5 per song. The equation of the cost is
Cs = 5 + 0.5x