Homework Help: math

Posted by denise on Saturday, April 3, 2010 at 9:57pm.

Different Interest Rates. Mrs. Brighton invested $30,000 and received a total of $2300 in interest. If she invested part of the money at 10% and the remainder at 5%, then how much did she invest at each rate?

math - Shaun, Sunday, April 4, 2010 at 11:26am
$30,000 Total

She invested $16,000 x .10 = $1600

She invested $14,000 x .05% = $700

$1600 +$700 = $2300

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