Fill in the Blank Using Elementary Row Operations to Form $\left[ \begin{array} { r r r } 2 & 1 & - 2 \\- 10 & - 1 & 9\end{array} \right]$

question 142

Multiple Choice

Fill in the blank using elementary row operations to form a row-equivalent matrix. $\left[ \begin{array} { r r r } 2 & 1 & - 2 \\- 10 & - 1 & 9\end{array} \right]$ $\left[ \begin{array} { l l l } 2 & 1 & - 2 \\0 & \square & - 1\end{array} \right]$

• A) \(\left[ \begin{array} { c c c }
• 2 & 1 & - 2 \\
• 0 & - 6 & - 1
• \end{array} \right]\)
• B) \(\left[ \begin{array} { l l l }
• 2 & 1 & - 2 \\
• 0 & 4 & - 1
• \end{array} \right]\)
• C) \(\left[ \begin{array} { r r r }
• 2 & 1 & - 2 \\
• 0 & - 4 & - 1
• \end{array} \right]\)
• D) \(\left[ \begin{array} { l l l }
• 2 & 1 & - 2 \\
• 0 & 1 & - 1
• \end{array} \right]\)
• E) \(\left[ \begin{array} { l l l }
• 2 & 1 & - 2 \\
• 0 & 0 & - 1
• \end{array} \right]\)

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Definitions:

Nonstochastic

Relates to a process or model that is deterministic, meaning it is not random and outcomes can be predicted with certainty.

Aging Population

Refers to the increasing median age in the population of a region due to declining fertility rates and/or rising life expectancy.

Lifespan

The length of time a person lives, from birth to death, including various factors that influence longevity.

Baby Boomer

A demographic group referring to people born during the post-World War II baby boom approximately between 1946 and 1964.