Answer
9000 was invested at 4.5% and 3000 at 4%
Work Step by Step
0.045x+(12000-x)$\times$0.04=525
4.5%=0.045
4%=0.04
0.045x-0.04x=45
x=9000
12000-x=?
12000-9000=3000
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 1 - Section 1.7 - Modeling with Equations - 1.7 Exercises - Page 75: 25
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