Use Matrices and Gauss-Jordan Elimination to Solve Systems
Solve the System

question 60

Multiple Choice

Use Matrices and Gauss-Jordan Elimination to Solve Systems
Solve the system of equations using matrices. Use Gauss-Jordan elimination.
- $$\begin{aligned}x + y - z + w & = - 5 \\3 x - y + 3 z - 2 w & = 7 \\- 2 x + 2 y + z - w & = 16 \\- x - 2 y - 3 z + 3 w & = - 22\end{aligned}$$

• A) \(\{ ( - 2,3,4 , - 2 ) \}\)
• B) \(\left\{ \left( - 2 , - 3,5 , \frac { 1 } { 2 } \right) \right\}\)
• C) \(\{ ( 2 , - 3 , - 4 , - 2 ) \}\)
• D) \(\left\{ \left( \frac { 1 } { 2 } , - \frac { 1 } { 3 } , - \frac { 1 } { 4 } , - \frac { 1 } { 2 } \right) \right\}\)

---

Definitions:

Below-market Pricing

Setting the price of a product or service lower than the prevailing market rates to attract customers or gain market share.

Above-market

Pricing or valuing something higher than the general market rate or expected standard.

Prestige Pricing

A pricing strategy where prices are set higher than competitors to convey an image of exclusivity or superior quality.

Price Lining

A pricing strategy where products are sold at predetermined price points, each representing a distinct level of quality or features.