Decide if the matrix is in row echelon form.
$$\left[ \begin{array} { c c c | c }
1 & 0 & 0 & 29 \
0 & 1 & 0 & 71 \
0 & 0 & 1 & - 87
\end{array} \right]$$
A) not in row echelon form
B) row echelon form

Question

Decide if the matrix is in row echelon form.
$$\left[ \begin{array} { c c c | c } 
1 & 0 & 0 & 29 \
0 & 1 & 0 & 71 \
0 & 0 & 1 & - 87
\end{array} \right]$$
A) not in row echelon form
B) row echelon form

Quizplus · Accepted Answer

The matrix is in row echelon form because it has leading 1s in each row, and each leading 1 is to the right of the leading 1 in the row above it. Additionally, all entries below the leading 1s are zeros.

Decide If the Matrix Is in Row Echelon Form [1002901071001−87]\left[ \begin{array} { c c c | c } 1 & 0 & 0 & 29 \\0 & 1 & 0 & 71 \\0 & 0 & 1 & - 87\end{array} \right]​100​010​001​2971−87​​

Decide If the Matrix Is in Row Echelon Form $\left[ \begin{array} { c c c | c } 1 & 0 & 0 & 29 \\0 & 1 & 0 & 71 \\0 & 0 & 1 & - 87\end{array} \right]$