1. Matrices NamingCalculatorApplication

2. Making & Naming a Matrix Matrix A

3. Matrix A is called a “Two by Three” “2 x 3” Rows first, Columns next You have to R ow your boat before you can C ome The 2 x 3 is called DIMENSIONS

4. What are the dimensions of Matrix C? 3 x 2 3 Rows 2 Columns

5. ADDRESS: Row 3, Column 2

8. Continuing in the Calc

9. Multiplying Matrices Columns in A = 3 Rows in B = 3 MULTIPLY! Columns in C = 2 Rows in D = 3 do NOT multiply !

10. Solving Systems Using Matrices THE BASICS: THE BASICS: If 2x = 10 Then (1/2)2x = 10 (1/2) x = 5 We took the reciprocal or inverse of 2 to solve the equation. Special button on calculator

11. Using the Calculator Matrix A is a 2 x 2 Matrix B is a 2 x 1 Solve for x by taking the inverse of A (use the special button!)

12. Putting it together

13. x is -7 and y is 15

14. Example

15. Calculator