Solve the System by the Best Method $$\left\{ \begin{array} { l } x + y = 6 \\y = 2 x\end{array} \right.$$

question 103

Multiple Choice

Solve the system by the best method. Use set notation to express the solution set.
- $$\left\{ \begin{array} { l } x + y = 6 \\y = 2 x\end{array} \right.$$

• A) \(\{ ( 2 , - 4 ) \}\)
• B) \(\{ ( - 2 , - 4 ) \}\)
• C) \(\{ ( - 2,4 ) \}\)
• D) \(\{ ( 2,4 ) \}\)

---

Definitions:

Planning Budget

A budget that outlines the expected revenues, expenditures, and resources over a specific period, serving as a financial roadmap for the organization.

Variable Cost

Costs that change in proportion to the level of activity or production volume of a company.

Materials Quantity Variance

The difference between the actual quantity of materials used in production and the expected quantity, multiplied by the standard cost per unit.

Actual Usage

The real amount of resources consumed or utilized in the production of goods or provision of services.