Set Up the System of Equations and Then Solve It

question 210

Multiple Choice

Set up the system of equations and then solve it by using inverse matrices. ​
Investment A company offers three mutual fund plans for its employees. Plan I consists of 4 blocks of common stock and 2 municipal bonds. Plan II consists of 8 blocks of common stock, 4 municipal bonds, and 6 blocks of preferred stock. Plan III consists of 14 blocks of common stock, 6 municipal bonds, and 6 blocks of preferred stock. An employee wants to combine these plans so that she has 82 blocks of common stock, 38 municipal bonds, and 36 blocks of preferred stock. How many units of each plan does she need?
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Definitions:

Hazardous Waste

Waste materials that are harmful to human health or the environment due to their toxic, corrosive, ignitable, or reactive properties.

Remedial

Pertaining to remedies or actions taken to rectify, correct, or improve a legal situation or condition.

Removal

The act of transferring or relocating something or someone from one place to another.

Clean Water Act

A fundamental U.S. federal law enacted in 1972 aimed at reducing pollutants discharged into waterways and regulating quality standards for surface waters.