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 transformation of the elements in Row 1, especially considering the change in the first element from -4 to 20, which can be achieved by adding 6 times the first element of Row 2 (4) to it.

Identify the Elementary Row Operation Being Performed to Obtain the New