###### Teacher Resources

###### Investigation 1

- Overview
- Activity 8.1.1 Introduction into Matrices and Matrix Operations
- Activity 8.1.2 Matrix Terminology and Laws for Matrix Operations
- Activity 8.1.3 Using Technology with Matrices
- Activity 8.1.4 Multiplying Matrices and the Inverse of a Matrix
- Activity 8.1.5 Comparing Laws of Matrix Operations with the Laws for Real Numbers

###### Investigation 2

- Overview
- Activity 8.2.1 Vectors and Vector Notation (Color copies required)
- Activity 8.2.2 Vector Components and Decomposition
- Activity 8.2.3 Strategies for Adding Vectors
- Activity 8.2.3b Practice with Resultant Vectors
- Activity 8.2.4 The Zero Vector and Subtracting Vectors
- Activity 8.2.5 Scalar Operations on Vectors

###### Investigation 3

###### Investigation 4

###### Investigation 5

- Overview
- Activity 8.5.1 Solving the Recycling Matrix Equation
- Activity 8.5.2 Cofactors, determinants and inverses
- Activity 8.5.3 Solving a 3×3 Contextual Application using Cofactors and Inverses
- Activity 8.5.4 Using Technology to Solve System of Equations with 3×3 Matrices
- Activity 8.5.5 Using Matrices to Find Triangular Areas
- Activity 8.5.6 Using Matrices as Transformations of Points, Lines and Various
*n*-gons