Use Cramerʹs Rule to Solve the System of Equations $$\begin{array} { r } - 2 x - 6 y - z = - 18 \\x - 7 y + 8 z = 59 \\- 4 x + y + z = 1\end{array}$$

question 7

Multiple Choice

Use Cramerʹs rule to solve the system of equations. If D = 0, use another method to determine the solution set.
- $$\begin{array} { r } - 2 x - 6 y - z = - 18 \\x - 7 y + 8 z = 59 \\- 4 x + y + z = 1\end{array}$$

• A) \(\{ ( 2 , - 1 , - 8 ) \}\)
• B) \(\{ ( 1,8,1 ) \}\)
• C) \(\{ ( 2,1,8 ) \}\)
• D) \(\{ ( 3 , - 1,8 ) \}\)

Calculate cash flows associated with an investment, including salvage values, working capital changes, and operational inflows.

Apply discount rates to cash flows to determine the present value in capital budgeting.

Understand and calculate the payback period for an investment.

Understand and calculate the simple rate of return for an investment.

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