Either the Dimensions of Two Matrices or the Matrices Themselves $$A = \left[ \begin{array} { l l } 3 & 4\end{array} \right] ; B = \left[ \begin{array} { r } - 3 \\6\end{array} \right]$$

question 19

Multiple Choice

Either the dimensions of two matrices or the matrices themselves are given. Find the dimensions of the product AB and
the product BA. If either is not defined, say so.
- $$A = \left[ \begin{array} { l l } 3 & 4\end{array} \right] ; B = \left[ \begin{array} { r } - 3 \\6\end{array} \right]$$

• A) \(\mathrm { AB }\) is not defined; \(\mathrm { BA }\) is \(2 \times 2\).
• B) \(\mathrm { AB }\) is \(1 \times 1\); BA is \(2 \times 2\).
• C) \(\mathrm { AB }\) is \(1 \times 1\); \(\mathrm { BA }\) is not defined.
• D) \(\mathrm { AB }\) is \(2 \times 2\); \(\mathrm { BA }\) is \(1 \times 1\).

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Definitions:

Book Value

The net value of a company's assets found on its balance sheet, and is calculated by subtracting liabilities from the total assets.

Adjusting Entries

The journal entries that bring the accounts up to date at the end of the accounting period.

Accounting Period

A specific time period in which all financial transactions are recorded and financial statements are prepared.

Allowance

An accounting adjustment for accounts receivable, representing a reduction in the amount expected to be received due to potential uncollectible debts.