To solve: The given system of linear equations using inverse of the coefficient matrix.
Answer to Problem 56E
The person invests
Explanation of Solution
Given information :
The system of linear equations:
Total investment
Annual return
Formula used :
To solve a system of linear equations:
If
Calculation :
As per the problem,
Put the given values of total investment and annual return in the given system of linear equations:
Write the system in the matrix form
Where
Then, use Gauss-Jordan elimination to find
Finally, multiply
The solution of the system is
Chapter 7 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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