Question

these are the following sizes of the matrix:
W: 6x4
X: 4x3
Y: 6x4
X: 1x6

which of these are defined?
a.) (A)(B)
b.) A + (1/4)(B)
c.) (D)(C)

I think its none of them but i'm not sure can someone help me out?

Answer 1

Some helpful facts: You can only add matricies that have the same number of rows and same number of columns. Multipliying a matrix by a constant doesn't change the number of rows and columns. You can only multiply two matrices when the number of columns of the left matrix is the same as the number of rows as the right matrix. You can multiply constants to any matrix. An a×b matrix is a matrix with a rows and b columns.