Question

If matrix A has dimensions 2 x 3 and matrix B has dimensions 3 x 3, what will be the dimensions of the product matrix of A and B?

3 x 3

3 x 2

2 x 3

These two matrices can’t be multiplied

Answer 1

Well an easy trick to see if the two can be multiplied, look at the 2nd number of the first matrix and the first of the second matrix and if they match, you can multiply them

Ex:

A:
1x2

B:

2X5

Answer 2

The first one ends with a 2 and the second one starts with a 2 so they can be multiplied, what kind of matrix you end up with deals with the outer two numbers so in this case they would make a 1x5 matrix, understand in this case for your question?

Answer 3

[a*b]x[b*c] = [a*c]

Answer 4

hope that helps you see what he said

Answer 5

i feel like like a dumb retricei know this one.