Roberto invested some money at 7%, and t

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$5.00 Roberto invested some money at 7%, and t

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Due on Nov. 02, 2009
Asked on Nov 02, 2009 at 7:16:03PM

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Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 9%. His total annual income from the two investments was $2930. How much was invested at 9%?

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Posted on Nov 02, 2009 at 7:24:45PM

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Preview: ... 2x 2000 (equation 2) To solve the sytem of equations, substitute equation 2 into equation 1 and solve for x: 0.07x 0.09(2x 2000) = 2930 ...

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Posted on Nov 02, 2009 at 7:30:36PM

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Preview: ... 0.18D + 180) Total income from the two investments = $(0.07D + 0.18D + 180) ...

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Posted on Nov 02, 2009 at 7:33:00PM

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Preview: ... unt at 9%. His total annual income from the two investments was $2930. How much was invested at ...

The full tutorial is about 99 words long .