Question

The average price for used DVDs at Moe's Movies is given by the equation y = 4x. In this equation, x represents the number of DVDs purchased and y represents the cost in dollars.
Based on the equation, which of the following is a true statement

A. 40 used DVDs cost $10
B. The cost of 30 used DVDs is $120
C. 30 used DVDs cost $34
D. The cost of 60 used DVDs is $30

Answer 1

We are given here the individual costs of DVD and CD as well as the total sales and the number of items sold on one day. To solve the number of DVDs and CDs sold each, we devise two independent linear equations:

(1) x + y = 39
(2) 4x + 7y = 204

x- number of DVDs; y - number of CDs

solving, x= 23 DVDs
y = 16 CDs

Answer 2

C it cost $34.00 in DVD the Movie?