2009-05-03, 10:46 PM
HooKarez Wrote:Melody has $45,000 to invest and wishes to receive an annual income of $4,290 from this money. She has chosen investments that pay 5%, 8% and 12% simple interest. Melody wants to have the amount invested at 12% to be double the amount invested at 8%. How much should she invest at each rate?
Humm....
Code:
Mathematical equations
x + y + z = 45000
.05x + .08y + .12z = 4290
-2y + z = 0
Matrix representing this problem
1 1 1 45000
.05 .08 .12 4290
0 -2 1 0Solve