Use Cramer's Rule to Solve the System of Equations $$\begin{array} { l } 9 x + 5 y = - 38 \\- 7 x - 2 y = 39\end{array}$$

question 238

Multiple Choice

Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set.
- $$\begin{array} { l } 9 x + 5 y = - 38 \\- 7 x - 2 y = 39\end{array}$$

• A) Cramer's rule does not apply since \(D = 0\); \(\varnothing\)
• B) \(\{ ( - 8,6 ) \}\)
• C) \(\{ ( - 7,6 ) \}\)
• D) \(\{ ( - 7,5 ) \}\)

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Definitions:

Triplens

Harmonics in an electrical system that are multiples of the third harmonic (e.g., 3rd, 9th, 15th), often causing additional heating in neutral wires.

Sequence

The order in which events, movements, or things follow each other or are arranged serially.

Transformer

An electrical device that transfers electrical energy between two or more circuits through electromagnetic induction, typically changing the voltage and current levels.

True-RMS

A measurement of AC voltage or current that accurately reflects the root-mean-square value, providing a true representation of power in a circuit, regardless of waveform shape.