Answer:
If this is supposed to be a math problem o think you messed up writing it
Step-by-step explanation:
Let the DVD = x
let the CD = y
x+y = cost
A dot<span> chart or </span>dot plot<span> is a statistical chart consisting of data points plotted on a fairly simple scale, typically using filled in circles. There are two common, yet very different, versions of the </span>dot<span> chart.</span>
3/18 = 0.166667
hope this helps .