Use Any Method to Solve the System of Linear Equations $\left\{ \begin{array} { c } 4 x - 5 y = 13 \\5 x + y = 9\end{array} \right.$

question 3

Multiple Choice

Use any method to solve the system of linear equations, find (x,y) . $\left\{ \begin{array} { c } 4 x - 5 y = 13 \\5 x + y = 9\end{array} \right.$

• A) (-1, -2)
• B)(-1, 2)
• C) (-2, -1)
• D) (2, 5)
• E) (2, -1)

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Definitions:

Direct Labor Rate Variance

The difference between the actual cost of direct labor and the expected (or standard) cost, often analyzed to manage and control production costs.

Time Variance

The difference between the planned amount of time to complete a project or task and the actual time taken.

Total Cost Variance

The difference between the actual cost and the standard or expected cost of goods or services produced over a given period.

Standard Cost

A predetermined cost of manufacturing a product or providing a service, used for budgetary and inventory purposes.