Solve the System of Equations by the Substitution Method $$\left\{ \begin{array} { r } x + 7 y = 35 \\- 4 x + 8 y = 40\end{array} \right.$$

question 11

Multiple Choice

Solve the system of equations by the substitution method.
- $$\left\{ \begin{array} { r } x + 7 y = 35 \\- 4 x + 8 y = 40\end{array} \right.$$

• A) \(( 1,4 )\)
• B) \(( 0,5 )\)
• C) \(( - 5,0 )\)
• D) \(\varnothing\)

---

Definitions:

Producer Surplus

The gap between what sellers are willing and able to accept for a good and the actual price they get because of the market conditions.

Lemonade

A sweetened beverage made from lemon juice, water, and sugar, commonly consumed during warm weather.

Out-of-Pocket Expenses

Direct payments made by individuals for goods or services without third-party assistance, such as insurance.

Producer Surplus

The difference between the amount a producer is willing to accept for a good or service and the actual amount received, reflecting the benefit to producers.