Use Matrices to Solve the System of Equations $\left\{ \begin{array} { l } 3 x + y = 13 \\x + 3 y = - 1\end{array} \right.$

question 14

Short Answer

Use matrices to solve the system of equations. If the equations of the system are dependent, or if the system is inconsistent, so indicate. $\left\{ \begin{array} { l } 3 x + y = 13 \\x + 3 y = - 1\end{array} \right.$

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Definitions:

Grocery Store

a retail establishment that primarily sells food, both fresh and packaged, along with other household goods.

Periodic Inventory System

An accounting method where inventory is physically counted at specific intervals to determine the cost of goods sold and ending inventory levels.

Gross Profit

The difference between sales revenue and the cost of goods sold, indicating how much a company earns from its core business activities before subtracting overheads.

Cost of Goods Available for Sale

The total cost of goods that a company has in its inventory and available for sale, including those purchased or manufactured.