Question 105110
Phyllis invested $12,000, a portion earning a simple interest rate of 4 and 1/2% per year and the rest earning a rate of 4% per year. after one year and the total interest earned on these investments was $525. how muchb money did she invest at each rate?
x=amount at {{{4(1/2)}}}%
12000-x=amount at 4%
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.045x+.04(12000-x)=525
.045x+480-.04x=525
.005x=45
x=9000
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12000-9000=3000
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amount at {{{4(1/2)}}}%= $9000
amount at 4% = $3000
:)