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algebra

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Glenn invested some money is a certificate of deposit (CD) with an annual yield of 9%. He invested twice as much money in a mutual fund with an annualy yield of 12%. His interest from the two investments at the end of the year was $396. How much money was invested at each rate? (l=prt)

  • algebra - ,

    9% investment ---- $x
    12% investment ---$ 2x

    solve
    .09x + .12(2x) = 396

    I suggest multiplying each term by 100
    9x + 12(2x) = 39600
    etc

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