For Exercise, set up a system of linear equations to represent the scenario. Solve the system by using Gaussian elimination or Gauss-Jordan elimination. Sylvia invested a total of $18,500. She invested part of the money in a certificate of deposit (CD) that earns 4% simple interest per year. She invested in a stock that returns the equivalent of 9% simple interest, and she invested in a bond fund that returns 3%. She invested four times as much in the stock as she did in the CD, and earned a total of $1140 at the end of 1 yr. How much principal did she put in each investment?
For Exercise, set up a system of linear equations to represent the scenario. Solve the system by using Gaussian elimination or Gauss-Jordan elimination. Sylvia invested a total of $18,500. She invested part of the money in a certificate of deposit (CD) that earns 4% simple interest per year. She invested in a stock that returns the equivalent of 9% simple interest, and she invested in a bond fund that returns 3%. She invested four times as much in the stock as she did in the CD, and earned a total of $1140 at the end of 1 yr. How much principal did she put in each investment?
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 39EQ
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For Exercise, set up a system of linear equations to represent the scenario. Solve the system by using Gaussian elimination or Gauss-Jordan elimination.
Sylvia invested a total of $18,500. She invested part of the money in a certificate of deposit (CD) that earns 4% simple interest per year. She invested in a stock that returns the equivalent of 9% simple interest, and she invested in a bond fund that returns 3%. She invested four times as much in the stock as she did in the CD, and earned a total of $1140 at the end of 1 yr. How much principal did she put in each investment?
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