Identify the Elementary Row Operation Being Performed to Obtain the New

question 87

Multiple Choice

Identify the elementary row operation being performed to obtain the new row-equivalent matrix.
Original Matrix New Row-Equivalent Matrix $\left[ \begin{array} { c c c } - 4 & 6 & 1 \\4 & - 1 & - 9\end{array} \right]$ $\left[ \begin{array} { c c c } 20 & 0 & - 53 \\4 & - 1 & - 9\end{array} \right]$

• A)Add 6 times Row 2 to Row 1.
• B)Add 3 times Row 1 to Row 2.
• C)Add 6 times Row 1 to Row 2.
• D)Add 4 times Row 2 to Row 1.
• E)Add 3 times Row 2 to Row 1.

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Definitions:

Heuristics

Mental shortcuts or rules of thumb that allow people to make decisions and solve problems quickly and efficiently, though not always perfectly accurate.

Overconfidence

The phenomenon where an individual's subjective confidence in their judgments is reliably greater than their objective accuracy.

Representativeness Heuristic

A cognitive shortcut that involves judging the probability of an event by how closely it matches one's prototype of that event.

Confirmation Bias

A propensity for selecting, interpreting, favoring, and recollecting data that affirms one's previously held beliefs or suppositions.