ok here is the question(adsbygoogle = window.adsbygoogle || []).push({});

The annual interest on Sid Carrington's three investments amounted to $21300: 5% ona savings account, 9% on mutual funds, and 11% on bonds.If the amount of Sid's investment in bonds was triple the amount of his investment in the savings account, and the interest earned from his investment in bonds was equal to the dividends he received from his investment in mutual funds, find how much money he placed in each type of investment.

? $ in a savings account

? $ in mutual funds

? $ in bonds

I set up the matrix as

.05 .09 .11 21300

3 0 -1 0

0 1 -1 0

and when I do rref on it I keep getting the wrong answer

would be great if I could get some help on this within 45 minutes

:shy:

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# Homework Help: Quick question with matrices

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