Answer:
what?
Step-by-step explanation:
Answer:
x=6
Step-by-step explanation:
13x+12=90
13x=78
x=6
Given:
The matrix multiplication

To find:
The order of resulting matrix.
Solution:
We know that, if order of first matrix is
and the order of second matrix is
, then the order of these two matrices is
.
We have,

Here, the order of first matrix is
and the order of the second matrix is
. So, the order of the second matrix is
. It is also written are 2 by 1.
Therefore, the correct option is A.
Answer:
B
Step-by-step explanation: