Use Matrices to Solve the System of Linear Equations Below $\left\{ \begin{array} { r } x - 2 z = 7 \\4 x - 4 y - z = 9 \\x - 2 y - 3 z = 20\end{array} \right.$

question 6

Multiple Choice

Use matrices to solve the system of linear equations below.
$\left\{ \begin{array} { r } x - 2 z = 7 \\4 x - 4 y - z = 9 \\x - 2 y - 3 z = 20\end{array} \right.$

• A) \(( - 3 , - 4 , - 5 )\)
• B) \(( - 5 , - 4 , - 3 )\)
• C) \(( - 3 , - 5 , - 4 )\)
• D) \(( - 4 , - 5 , - 3 )\)
• E) \(( 1,5,4 )\)

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Interest Rate

The proportion of a loan that is charged as interest to the borrower, typically expressed as an annual percentage of the loan outstanding.

Discount Rate

The interest rate applied within the framework of discounted cash flow analysis to estimate the present value of future cash inflows.

Present Value

The present-day worth of money expected in the future or series of cash flows, calculated using a fixed rate of return.

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The process where interest is added to the principal amount each month, and future interest is earned on the increased balance.