13, 6+7=13 thats my answer :D
The answer is A) -23
A is a 1x3 Matrix while B is 3x1 Matrix. Since A has the same number of rows as that of the number of columns of B, they can be multiplied. A has 1 row and B has 1 column. So, their products is a 1x1 Matrix.
Simply, the operation is:
(3)(-1) + (-2)(4) +(6)(-2) = -23
The picture shows the answer I got!
Also! For the future, I use a site called
math way and it is great for problems like these.
You didn’t ummm put a picture
I think this is inconsistent because I got "y" by itself in both equations and not the slope nor the base number matched.