A music store sells CD’s and DVD’s. The price of a CD is $8 and the price of a DVD is $12. On Saturday, a total of 20 CD’s and DVD’s were sold bringing in revenue of $200. How many of each type were sold that day

10 of CD and 10 of DVD

Step-by-step explanation:

We have to think about the fact that 200 ends in two zeros in order to get it as the sum of the CD's and DVD's. In order to get 200, we most likely have to have numbers that also end in zero.  So if easily we can try 12*10 + 8*10, becasue they will end is zeros that way... AND WHAT DO WE KNOW, WE HAVE GOT OUR ANSWER, thi is because 12*10 + 8*10 really does equal 200.

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5