1. Lesson 6­6.notebook
November 22, 2013
Assignment:
1­­>L6,6, pg. 372 ­ 373, #2­22 (evens) ­ Due Monday (11/25)
2­­>Checkpoint 6.5­6.6 ­ Due Tuesday (11/26)
3­­>Chapter 6 Test ­ Tuesday (12/3)

2. Lesson 6­6.notebook
November 22, 2013
Lesson 6.6 WarmUp:
Determine the best way to solve each system ­ then solve it!
1)
­3x + y = ­3
4x + 2y = 14
2)
y + 4x = 3
y = ­4x ­ 1
3)
4x + 2y = 10
5x ­ 3y = 7
4)
At a SJ basketball game, the team scored a total of 45 points. Some of the shots were 3 pts and
some of the shots were 2 pts. Find out how many of each were made, if they made a total of 18
baskets.
5)
Adult tickets are $15 and student tickets are $12. If a total of 11 tickets were bought and the
cost was $156, how many of each type was bought?

3. Lesson 6­6.notebook
November 22, 2013
Lesson 6.6:
*matrix ­ a rectangular arrangement of numbers in rows and columns
enclosed in brackets.
*element ­ each number in a matrix
*dimensions ­ the number of rows and columns in a matrix
­9
3
­4
5
­3
8
[
[
7
­1
0
3
6
2
}
rows
}
columns
this is a 3 x 4 matrix
­3 is row 2, column 3

4. Lesson 6­6.notebook
November 22, 2013
*If 2 matrices have the same dimensions, they can be added or
subtracted....if not, they are impossible!
**Also, you can multiply a matrix by a constant called a scalar.....and is
known as scalar multiplication.

5. Lesson 6­6.notebook
November 22, 2013
Lesson 6.6 examples:
Perform the indicated matrix operations.
[
8
­3
­1
11
7
­2
5
8
0
[
5
8
0
+
[
­4
6
7
­
[
­4
6
7
10 ­9
­12 ­1
5 3
10 ­9
­12 ­1
5 3
[
11
7
­2
[
B)
[
8
­3
­1
[
A)

6. Lesson 6­6.notebook
November 22, 2013
[
2
1
7
8
­1
­3
10
­9
0
5
­11
­4
[
2
1
7
8
­1
­3
10
­9
0
5
­11
­4
D)
­5
[
5
[
C)

7. Lesson 6­6.notebook
November 22, 2013