Find the Values of the Variables for Which the Statement $$\left[ \begin{array} { c c } x + 3 & y + 4 \\7 & - 8\end{array} \right] = \left[ \begin{array} { c c } 8 & - 5 \\7 & k\end{array} \right]$$

question 384

Multiple Choice

Find the values of the variables for which the statement is true, if possible.
- $$\left[ \begin{array} { c c } x + 3 & y + 4 \\7 & - 8\end{array} \right] = \left[ \begin{array} { c c } 8 & - 5 \\7 & k\end{array} \right]$$

• A) \(x = 8 ; y = - 5 ; k = - 8\)
• B) \(\mathrm { x } = 5 ; \mathrm { y } = - 9 ; \mathrm { k } = - 8\)
• C) \(x = 5 ; y = - 8 ; k = 8\)
• D) \(\mathrm { x } = - 5 ; \mathrm { y } = 9 ; \mathrm { k } = 8\)

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Definitions:

Selling Price

The amount at which a product or service is sold to customers, determined by factors such as market demand, production costs, and competition.

Variable Cost

Costs that vary directly with the level of production or business activity.

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The revenue generated from goods or services sold, expressed in dollars.

Break-Even Point

The production level at which total revenues equal total expenses, resulting in no net loss or gain.