Use Cramer's Rule to Find the Solution of the System,if $$\left\{ \begin{aligned}5 x - y & = 12 \\x + y & = 0\end{aligned} \right.$$

question 45

Multiple Choice

Use Cramer's rule to find the solution of the system,if possible.? $$\left\{ \begin{aligned}5 x - y & = 12 \\x + y & = 0\end{aligned} \right.$$ ?

• A)x = 2,y = -2
• B)x = 5,y = -12
• C)x = 5,y = -5
• D)The system is inconsistent.
• E)The equations are dependent.

Recognize the impact of service levels on customer shopping experience.

Analyze the strategies retailers use to differentiate themselves in a competitive market.

Understand the concept and variety of retail formats, including hypermarkets, specialty stores, and category killers.

Recognize examples of intertype competition and scrambled merchandising.

---

Definitions:

Aquifer

A body of permeable rock that can contain or transmit groundwater.

Groundwater Flow

The movement of water through the subsurface soil and rocks, primarily driven by gravity and pressure differences.

Permeability

Permeability is a measure of the ability of a porous material (such as rock or soil) to allow fluids to pass through it.

Perched Water

Groundwater that sits above the main water table and generally is underlain by a layer or lens of impermeable rock that blocks the downward flow of groundwater.