i invest 45000, some in 4% short term bonds and some at 7% bonds. my income is 2750. how much is in each fund±

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If you're not leaving any information out of the question about the time period of income and bonds etc. then you have a system of equations you need to set up. If x is the amount in the 4% and y is the amount in the 7% then you have the two equations: x + y = 45000 .04*x + .07*y = 2750 Solve for x and y and there you go.