The matrix `A` has `x` rows and `(x+5)` column. If the matrix `B` has `y` rows and `(11-y)` columns `&` both `A Ba n dB A` exist, then `x=8` (b) `x=3` `y=6` (d) `y=8`

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

The matrix A has 3 rows and 27 columns. How many elements are there in A?

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

A matrix has 3 rows and 4 columns. How many elements are there in A?

A matrix X has a+b rows and a+2 columns while the matrix Y has b+1 rows and a+3 columns. Both matrices X Y and Y X exist. Find a and b . Can you say X Y and Y X are of the same type? Are they equal.

Matrix X has r rows and c columns, and matrix Y has c rows and d columns, where r, c and d are different. Which of the follwing statements must be true? I. The product YX exists. II. The product of XY exists and has r rows and d columns. III. the product XY exists and has c rows and c columns.

If the point P(x ,\ y) is equidistant from A(5,\ 1) and B(-1,\ 5) , then (a) 5x=y (b) x=5y (c) 3x=2y (d) 2x=3y

If P is a point (x ,y) on the line y=-3x such that P and the point (3, 4) are on the opposite sides of the line 3x-4y=8, then x >8/(15) (b) x >8/5 y<-8/5 (d) y<-8/(15)

If the mean of 6,\ 7,\ x ,\ 8,\ y ,\ 14 is 9, then (a) x+y=21 (b) x+y=19 (c) x-y=19 (d) x-y=21

If (-2,\ 1) is the centroid of the triangle having its vertices at (x ,\ 0),\ (5,\ -2),\ (-8,\ y), then x ,\ y satisfy the relation 3x+8y=0 (b) 3x-8y=0 (c) 8x+3y=0 (d) 8x=3y