SOLUTION: Trey has saved some money and is going to buy some music. The number N of CDs Trey can buy is inversely proportional to the cost C of a CD. If the cost of one CD is $8, then he can

Question 1082235: Trey has saved some money and is going to buy some music. The number N of CDs Trey can buy is inversely proportional to the cost C of a CD. If the cost of one CD is $8, then he can buy 9. If the cost of one CD is $12, then how many CDs can he buy?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Trey has saved some money and is going to buy some music.
The number N of CDs Trey can buy is inversely proportional to the cost C of a CD.
If the cost of one CD is $8, then he can buy 9.
If the cost of one CD is $12, then how many CDs can he buy?
:
let n = no. of CD's he can buy
An inverse proportion equation
=
cross multiply
12n = 8 * 9
12n = 72
n = 72/12
n = 6 cd's
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