Choose the One Alternative That Best Completes the Statement or Answers

question 6

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Use Cramer's rule to solve the linear system.
- $$\left\{ \begin{array} { c } 2 x + 5 y = 21 \\2 x + y = 1\end{array} \right.$$

• A) \(x = 5 , y = - 2\)
• B) \(x = - 5 , y = - 2\)
• C) \(x = - 2 , y = 5\)
• D) \(x = 2 , y = - 5\)

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Definitions:

Pulse Width Modulation

A method used in electronic control to regulate the amount of power delivered to an electrical device, by effectively chopping up the power supply into controlled intervals.

Fixed Frequency

A characteristic of oscillating systems or signals that maintain a constant frequency over time, typically used in various electronics and communications systems.

Solid State

A semiconductor circuit or device.

Solenoid

An electromagnetic device consisting of a coil and armature designed to perform mechanical work when energized. Used in just about every electrical circuit on modern vehicles, whether it be in the starter circuit, transmission, or door locks.