Solve the System of Equations Using Substitution $$\left\{ \begin{array} { l } x y - x ^ { 2 } = - 20 \\x - 2 y = 3\end{array} \right.$$

question 13

Multiple Choice

Solve the system of equations using substitution.
- $$\left\{ \begin{array} { l } x y - x ^ { 2 } = - 20 \\x - 2 y = 3\end{array} \right.$$

• A) \(x = - 5 , y = - 1 ; x = 8 , y = \frac { 11 } { 2 }\)
• B) \(x = - 5 , y = - 1 ; x = \frac { 11 } { 2 } , y = 8\)
• C) \(x = 5 , y = 1 ; x = - 8 , y = - \frac { 11 } { 2 }\)
• D) \(x = 5 , y = 1 ; x = - \frac { 11 } { 2 } , y = - 8\)

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Definitions:

Constant Dollar

An accounting method that adjusts financial statements for inflation, thereby allowing comparison of buying power across different periods.

Inflation

The rate at which the general level of prices for goods and services is rising, subsequently eroding purchasing power.

Initial Withdrawal

The first amount of money taken out from an investment or retirement account.

Fixed Cash Flow

Stable and predictable cash inflows or outflows over a period, crucial for budgeting and financial planning.