SOLUTION: Jane invested $24,000, part at 7% and part at 3%. If the total interest at the end of the year is $880, how much did she invest at 7% An employee who produces x units per hour e

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Question 98276: Jane invested $24,000, part at 7% and part at 3%. If the total interest at the end of the year is $880, how much did she invest at 7%
An employee who produces x units per hour earns an hourly wage of y+0.45x+12(in dollars). Find the hourly wage for an employee who produces 17 units per hour.
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
.07*X+.03(24,000-X)=880
.07X+720-.03X=880
.04X=880-720
.04X=160
X=160/.04
X=4000 INVESTED @ 7%.
24,000-4,000=20,000 INVESTED @ 3%.
PROOF
.07*4000+.03*20,000=880
280+600=880
880=880