Question

matrices 1 by 2 can be multiplyed with matrices 2 by 1?

Answer 1

matrix
\(\Large a \times b \)
can be multiplied with matrix
\(\Large b \times c\)

Answer 2

the requirement is that columns of first matrix should be equal to rows of 2nd matrix

Answer 3

Hint attached.

http://www.mathsisfun.com/algebra/matrix-multiplying.html

Answer 4

\(\Large M_{a\times b } \times M_{b\times c} = M_{a\times c}\)

Answer 5

yes they can