SOLUTION: Judith is about to invest $27,000, part at 4% and the rest at 8%. What is the most she can invest at 4% and still be guaranteed at least $2000 a year?

SOLUTION: Judith is about to invest $27,000, part at 4% and the rest at 8%. What is the most she can invest at 4% and still be guaranteed at least $2000 a year?

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Question 462340: Judith is about to invest $27,000, part at 4% and the rest at 8%. What is the most she can invest at 4% and still be guaranteed at least $2000 a year?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
0.04x+0.08(27000-x)=2000
0.04x+2160-0.08x=2000
-0.04x=-160
x=-160/-0.04
x=4,000 at 4%
27000-4000=23,000 at 8%
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