
Concept explainers
To Find: The cost of each item on her order is using augmented matrices.

Answer to Problem 81SR
Cost of batteries is
Cost of spark plugs
Cost of wiper blades
Explanation of Solution
Given: Shandra is inventory manager for a local repair shop. She ordered
The augmented matrix representing the situation is
Now
Using the graphing calculator to solve the system
KEYSTROKES:
Now
The matrix is
Thus
Cost of batteries is
Cost of spark plugs
Cost of wiper blades
Chapter 7 Solutions
Glencoe Algebra 2 Student Edition C2014
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