8.2 Matrices

Objective: Perform basic operations with matrices

Standard: Linear Algebra 4.0 and 5.0

What's a Matrix?

Matrix Addition

Ex. 1)

Ex. 2)

Scalar Multiplication

Ex. 3)

Ex. 4)

Matrix Multiplication

The sum of the products of rows and columns

Note: The columns in the first matrix must match the rows in the second matrix. Example:

Ex. 5)

Order Matters!!

The Identity Matrix

Basically, 1s on the diagonal

Assignment:

#11 p. 597#3, 6-8, 15, 23, 28-30, 41, 43