Question

Matrix A has dimensions 3 x 1. Matrix B has dimensions 1 x 5. These two matrices can be muliplied. True or False

Answer 1

if you match up the shapes so the "inside numbers" are equal , you can multiply the matrices in that order

example: 3 x 2 and 2 x 6
if we write it 3 x 2 x 2 x 6
the insides numbers (the 2's ) match up. so you can multiply them.