Row matrix and column matrix

Transpose of a column matrix is a column matrix.

Interchanging of elements of rows and columns of a matrix is called.

If A is a row matrix as well as a column matrix then what is the order of A?

Let A be a square matrix and B be a matrix obtained from A by adding to a row/column of A a scalar multiple of another row/column of A; then |B|=|A|

If A is a non-null row matrix with 5 columns and B is a non-null column matrix with 5 rows, how many rows are there in A xx B ?

Matrix A has (2y+1) rows and (x+9) columns matrix B has (19-x) rows and (y+3) columns.If both AB and BA exist then the value of (x+2y) is equal to

Matrix A has x rows and x+5 columns. Matrix B has y rows and 11-y columns. If both AB and BA exist, then the ordered pair (x, y) is

Matrix A ha s m rows and n+ 5 columns; matrix B has m rows and 11 - n columns. If both AB and BA exist, then (A) AB and BA are square matrix (B) AB and BA are of order 8 xx 8 and 3 xx 13, respectively (C) AB=BA (D) None of these