Use Cramerʹs Rule to Solve the System of Equations $$\begin{array} { c } x + 3 y = - 21 \\- 2 x + 4 y = - 28\end{array}$$

question 468

Multiple Choice

Use Cramerʹs rule to solve the system of equations. If D = 0, use another method to determine the solution set.
- $$\begin{array} { c } x + 3 y = - 21 \\- 2 x + 4 y = - 28\end{array}$$

• A) \(\{ ( 0 , - 7 ) \}\)
• B) \(\{ ( 1 , - 8 ) \}\)
• C) Cramer's rule does not apply since \(D = 0 ; \varnothing\)
• D) \(\{ ( 7,0 ) \}\)

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