Hi! I need help with these two questions. Thanks! :)

Question

1.) Can we multiply the Matrix A (which is 3 x 4 matrix) by the other matrix, Matrix B (which is 3 x 4 matrix)?

True Or False?

2.) When we multiply the 6 x 3 matrix by the 3 x 1 matrix, the final matrix would be in what order? Put your final answer as m x n.

Answer 1

false
6x1

You can only multiply two matrices if the columns of the 1st are the same as the rows of the second. That is, the dimensions must be of the form

axb and bxc

a and c may be anything, but the b's must match. The result is axc.

Answer 2

x+2y+z=1
-x+y+2=6
4x-y+3z=-1