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October 21, 2014

October 21, 2014

Posted by **Briana** on Friday, September 7, 2012 at 4:57pm.

Calvin invested $7500 for one year, part 12% annual interest and the rest at 10% annual interest. His total interest for the year was $890. How much money did he invest at 12%? Show work.

- algebra -
**Henry**, Saturday, September 8, 2012 at 10:06pm$X @ 12%.

$(7500-X) @ 10%

I = 0.12X + 0.1(7500-X) = $890.

0.12x + 750 - 0.1x = 890.

02x = 890 - 750 = 140

X = $7,000 @ 12%.

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