Question

Can someone help with this!

Answer 1

In the given image, $a_{23}$ is 5. The correct option is the first option 5

Matrix notation

From the question, we are to determine which entry in the given matrix represents $a_{23}$

NOTE: For any entry denoted as $a_{mn}$, it represents the entry in the m-th row and n-th column.

Thus,  

 $a_{23}$ represents the entry in the 2nd row and 3rd column.

In the given image, the entry in the 2nd row and 3rd column is 5.

Hence, in the given image, $a_{23}$ is 5. The correct option is the first option 5

Learn more on Matrix notation here: brainly.com/question/2382978

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