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Which is a coefficient matrix for the system of linear equations?

Which is a coefficient matrix for the system of linear equations?-example-1
User Matusalem
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2 Answers

4 votes

Answer:

d

Explanation:

User Btlog
by
7.1k points
4 votes

Answer:

  • D. 1

Explanation:


  • -2\left[\begin{array}{cc}x&-1\\3&5\end{array}\right]+\left[\begin{array}{cc}3&8\\-1&6\end{array}\right] = \left[\begin{array}{cc}x&10\\-7&-4\end{array}\right]

  • \left[\begin{array}{cc}-2x&2\\-6&-10\end{array}\right]+\left[\begin{array}{cc}3&8\\-1&6\end{array}\right] = \left[\begin{array}{cc}x&10\\-7&-4\end{array}\right]

  • \left[\begin{array}{cc}-2x+3&2+8\\-6-1&-10+6\end{array}\right] = \left[\begin{array}{cc}x&10\\-7&-4\end{array}\right]

  • \left[\begin{array}{cc}-2x+3&10\\-7&-4\end{array}\right] = \left[\begin{array}{cc}x&10\\-7&-4\end{array}\right]
  • -2x + 3 = x
  • 3x = 3
  • x = 1

Correct choice is D

User Matthew Spencer
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