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Moderate

Multiplying Matrices 2

ACTMAT-1REWFJ

Which of the following represents the product of the two matrices below?

$$ \begin{bmatrix} 3 & 6 \end{bmatrix}\begin{bmatrix} 3 & 1 \\\ -2 & -4 \end{bmatrix} $$

A

$ \begin{bmatrix} -3 & -21 \end{bmatrix} $

B

$ \begin{bmatrix} -24 \end{bmatrix} $

C

$ \begin{bmatrix} 9 & 6 \\\ -6 & -24 \end{bmatrix} $

D

$ \begin{bmatrix} -3 \\\ -21 \end{bmatrix} $

E

$\text{It is not possible to multiply these two matrices in this order.}$