Maria invested a total $26000 into three accounts: a saving account paying  3% interest, a CD deposit paying 4% interest, and a bond paying 5% interest.  Her total annual interest from the three investments was $1000. The interest from  the saving account was $460 less than the total interest from the other two  investments. What is the determinant of the matrix?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Maria invested a total $26000 into three accounts: a saving account paying  3% interest, a CD deposit paying 4% interest, and a bond paying 5% interest.  Her total annual interest from the three investments was $1000. The interest from  the saving account was $460 less than the total interest from the other two  investments. What is the determinant of the matrix?

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