Multiplying Matrices

To determine whether or not matrices can be multiplied you first have to write a dimensions statement.

Example of a dimensions statement:
[ 8 7 ]  [ 4 ]
[ 5  2 ]  [ 1 ]

Dimensions statement:
2 X 2 times 2 X 1



These matrices can be multiplied, so you would multiply row by column.
 Get the sum of the products.
The numbers in yellow tell you that you can multiply the matrices.
The numbers in green tell you the size of the final matrix.