Solve the System by Using the Substitution Method $$\left( \begin{array} { l } 4 x - 5 y = 7 \\8 x + 15 y = - 26\end{array} \right)$$

question 251

Multiple Choice

Solve the system by using the substitution method. $$\left( \begin{array} { l } 4 x - 5 y = 7 \\8 x + 15 y = - 26\end{array} \right)$$

• A) \(\left( - 1 , - \frac { 8 } { 5 } \right)\)
• B) \(\left( - \frac { 1 } { 4 } , - \frac { 8 } { 5 } \right)\)
• C) \(\left( - \frac { 8 } { 5 } , - \frac { 1 } { 4 } \right)\)
• D) infinitely many solutions
• E) no solutions

Calculate and evaluate the net present value (NPV) and internal rate of return (IRR) of investments.

Understand the impact of taxes, depreciation methods, and salvage values on investment decisions.

Apply financial principles to retirement planning, including saving strategies and income requirements.

Assess investment opportunities by understanding and calculating future values and cash flows.

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