1. Matrices and Data
Holt Algebra 2

2. Definitions
Matrix is a rectangular arrangement of numbers into rows and columns
Dimensions are read row x column
Address is read through the location
8/1/2018 2:24 AM
4.1 Matrix Operations

3. Reading Matrices A12 ROW A11 A13 A21 A23 A22 COLUMN 2 3 2 x 3 5 A13
How many total rows does it have?
How many total columns does it have?
What are its dimensions?
What is the entry of A22?
What is the address of 3? 3
2 x 3
Row X column
Row 2 column 2 5
A13
Row 1 column 3

4. -3 4 -8 2 -8 16

5. Entering a Matrix into the calculator:
Push 2nd x-1
Arrow over to edit, use up and down arrows to select matrix name, enter
Enter number of rows,
Enter number of columns,
Enter each entry followed by enter.
2nd quit to “save” the information in the Matrix
2---enter
2---enter
-3--enter
4---enter
2---enter
-8---enter

6. Entering a Matrix into the calculator:
Push 2nd x-1
Arrow over to edit, arrow down to B to select matrix name, enter
Enter number of rows,
Enter number of columns,
Enter each entry followed by enter.
2nd quit to “save” the information in the Matrix
2---enter
1---enter
-8--enter
16---enter

7. Using the matrix once it is entered:
2nd x-1
1---enter
x-1 ---enter
2---enter
enter -1
x = 0 and y = -2

8. 4 -2 3 -2 2 2 5 16 -5 -2 8 4

9. Entering a Matrix into the calculator:
Push 2nd x-1
Arrow over to edit, use up and down arrows to select matrix name, enter
Enter number of rows,
Enter number of columns,
Enter each entry followed by enter.
2nd quit to “save” the information in the Matrix
3---enter
3---enter
4--enter
-2---enter
3---enter
2--enter
2--enter
5--enter
8--enter
-5--enter
-2--enter

10. Entering a Matrix into the calculator:
Push 2nd x-1
Arrow over to edit, arrow down to B to select matrix name, enter
Enter number of rows,
Enter number of columns,
Enter each entry followed by enter.
2nd quit to “save” the information in the Matrix
3---enter
1---enter
-2--enter
16---enter
4---enter

11. Using the matrix once it is entered:
2nd x-1
1---enter
x-1 ---enter
2---enter
enter -1
x = 5 and y = 8 and z = -2

12. #6
Change on worksheet