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.

Question

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.

Quizplus · Accepted Answer

To obtain the new row-equivalent matrix, 6 times Row 2 is added to Row 1. This is evident from the changes in the elements of Row 1, where each element is the result of adding 6 times the corresponding element in Row 2 to the original element in Row 1.

Identify the Elementary Row Operation Being Performed to Obtain the New