Build a Variable Expression for the Given Phrase $x - 2$

question 297

Multiple Choice

Build a variable expression for the given phrase.
-A number decreased by two

• A) \(x - 2\)
• B) \(2 - x\)
• C) \(\frac { x } { 2 }\)
• D) \(x + 2\)

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Definitions:

ECG Tracing

The recorded activity of the heart obtained through an electrocardiogram, showing the heart's electrical movements.

Lead Wires

Conductive wires used in medical settings to connect electrodes or sensors to diagnostic equipment or monitoring devices.

Arrhythmia

Irregularity in heart rhythm.

Electrodes

Conductive materials or devices that connect non-metallic parts of a circuit, often used in various medical devices and experiments to conduct electrical currents.