Choose the phrase that best describes the matrix.
-1 -3 -1
9-9-1
-1 -3
T.TT
coefficient matrix
augmented matrix in row-echelon form
augmented matrix
none of the above

Choose the phrase that best describes the matrix 1 3 1 991 1 3 TTT coefficient matrix augmented matrix in rowechelon form augmented matrix none of the above class=