A used book store started selling used CDs and DVDs. In the first week, the store sold a combined total of 40 used CDs and DVDs. Each CD sold for $4.00 and each DVD sold for $6.00. The sales for both CDs and DVDs totaled $180.00. Lex x = CD sales and y = DVD sales

Part 1 Write a system of equations to solve for the number of CDs and DVDs sold.

Part 2 Graph the system of equations (send me a picture of your graph or if you know how place in here)

Part 3 State the solution, that is, how many CD's and DVDs were sold during the first week?

c + v = 40

4c + 6v = 180

c = 40 - v

4(40 - v) + 6v = 180

160 - 4v + 6v = 180

2v = 20

v = 10

c = 40 - 10

c = 30

30 - 10 = 20

Step-by-step explanation:

step-by-step explanation:

so first find out how much each is worth.

quarter= 25 cents

dime= 10 cents

pennies= 1 cent

then multiply each by how much each is worth.

200                     150                   300

x                         x                     x   1

  25                       10              

                                  300

1000                     1500

+                          

4000                                      

5000                                  

then count 2 from the back and add a period.

$50.00

$15.00

$3.00

and then add them

  $50.00

+

  $15.00

+

    $3.00

$68.00

so sunghee has $68.00

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