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27 June, 05:39

Hanai invested $20,000, part at 3% interest and part 5% interest. The investment returned $800. What is the system of equations that represents this situation

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  1. 27 June, 06:11
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    t + f = 20000 3%·t + 5%·f = 800

    Step-by-step explanation:

    Let t represent the amount invested at three percent; let f represent the amount invested at five percent. The total of these amounts is $20,000. The total of the interest earned by each amount is $800. Of course the interest earned is the amount multiplied by the interest rate.
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