Use the Gauss-Jordan Method to Solve the System of Equations $4 x-5 y-7 z=-1$

question 214

Multiple Choice

Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, let the last
variable be the arbitrary variable.
- $4 x-5 y-7 z=-1$
$-7 x+2 y-8 z=1$
$20 x-25 y-35 z=-5$

• A) \( \{(-5 z+2,4 z-25, z)\} \)
• B) \( \{(-1,1,-5)\} \)
• C) \( \varnothing \)
• D) \( \{(5,5,-1)\} \)

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Definitions:

Financial Leverage

The use of borrowed funds to increase the potential return on an investment.

Shareholder Leverage

The use of borrowed funds by shareholders to increase their potential returns from an investment.

Operating Leverage

A measure of how revenue growth translates into growth in operating income due to fixed costs in a company's business model.

Tax Rate

The percentage at which an individual or corporation is taxed by the government on their income or profits.