SALES A used book store also started selling used CDs and videos. In the first week, the store sold 40
used CDs and videos, at $4.00 per CD and $6.00 per
video. The sales for both CDs and videos totaled
$180.00
a. Write a system of equations to represent the situation.
y = 4, y = 6
b. Graph the system of equations.
c. How many CDs and videos did the store sell in the first week?