Solve the System by Using the Inverse of the Coefficient $$\begin{aligned}x + 3 y & = - 8 \\21 x + 6 y & = 3\end{aligned}$$

question 221

Multiple Choice

Solve the system by using the inverse of the coefficient matrix.
- $$\begin{aligned}x + 3 y & = - 8 \\21 x + 6 y & = 3\end{aligned}$$

• A) \(\{ ( - 3,1 ) \}\)
• B) \(\{ ( 1 , - 3 ) \}\)
• C) \(\{ ( - 1,3 ) \}\)
• D) \(\{ ( 3 , - 1 ) \}\)

Identify the key factors that promoted western development post-Reconstruction.

Describe the challenges faced by the North in developing and implementing a Reconstruction plan.

Explain the diverse perspectives and expectations regarding the Reconstruction process among different social and political groups.

Understand the significance of formulating testable predictions to counteract hindsight bias.

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