SOLUTION: kyle plans to invest $8500, part at 4% simple interest and the rest at 5% simple interes what is the most that he can invest at 4% and still be guaranteed at least $405 in interest

Question 655196: kyle plans to invest $8500, part at 4% simple interest and the rest at 5% simple interes what is the most that he can invest at 4% and still be guaranteed at least $405 in interest per yeay?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
kyle plans to invest $8500, part at 4% simple interest and the rest at 5% simple interes what is the most that he can invest at 4% and still be guaranteed at least $405 in interest per yeay?
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let x= most of the $8500 than can be invested at 4%
8500-x=amt that will be invested at 5%
..
4%x+5%(8500-x)=405
.04x+425-.05x=405
.01x=20
x=2000
most of the $8500 than can be invested at 4%=$2000

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