Solve the System $$\begin{array} { r } 5 x - 4 y - 2 z + 1 = 0 \\15 x - 4 y + 4 z - 4 = 0 \\8 y + 2 z - 3 = 0\end{array}$$

question 320

Multiple Choice

Solve the system.
- $$\begin{array} { r } 5 x - 4 y - 2 z + 1 = 0 \\15 x - 4 y + 4 z - 4 = 0 \\8 y + 2 z - 3 = 0\end{array}$$

• A) \(\left\{ \left( - \frac { 1 } { 5 } , \frac { 1 } { 4 } , - \frac { 1 } { 2 } \right) \right\}\)
• B) \(\left\{ \left( - \frac { 1 } { 5 } , - \frac { 1 } { 4 } , \frac { 1 } { 2 } \right) \right\}\)
• C) \(\varnothing\)
• D) \(\left\{ \left( \frac { 1 } { 5 } , \frac { 1 } { 4 } , \frac { 1 } { 2 } \right) \right\}\)

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Definitions:

Present Value

The present worth of a future amount of money or series of monetary inflows, considering a certain rate of interest.

Present Value Amount

The current value of a future sum of money or stream of cash flows given a specified rate of return, important in discounting and investment decisions.

Rate of Earnings

A measure of profitability that indicates how much profits a company generates from its operations.

Present Value Factor

A factor used to calculate the present value of a future amount of money or stream of payments, considering a specific interest rate.