Question

(Look at the pic) what is FC?

Answer 1

The element on the position (1,1) in the product matrix FC is a scalar product of the first row in F and the first column in C.

Therefore the element in the position (1,1) in FC will be a scalar product of (-2,0) and (12,1):

                               $-2\cdot 12+0\cdot 1 = -24+0=-24$

The only matrix that has a value of -24 in the position (1,1) is matrix B.

Therefore, the answer is matrix B.