1. Do Now 10/05/09 Take out HW from Friday. Text p.73, #12-48 evens
Copy HW in your planner.
Punchline worksheets 30 & 34
Quiz sections 2.1 – 2.3 Thursday
Be ready to copy POTW #5

2. Parts of an Expression 3x + 17 – x – 24 3x + 17 + (-1x) + (-24)
In your notebook, list the terms, like terms, coefficients, and constants of the expression below. Then simplify the expression and explain in words what you combined together.
3x + 17 – x – 24
3x (-1x) + (-24)
3x, 17, -1x, -24
1) List the terms of the expression.
2) List the coefficients of the expression.
3, -1
3) List the like terms of the expression.
3x & -1x, 17 & -24
4) List the constant terms of the expression.
17, -24
5) Simplify the expression.
2x + (-7) or 2x – 7

3. Homework Text p.73, #12-48 evens
12) 16
14) -42
16) -260
18) -20
20) 392
22) -633
24) 24.8
26) -65.7
28) 4x - 8
30) -6 +2r
32) 12p + 6
34) 99 – 54m
36) 435 players
38) (12x – 8) units²
40) (39 – 13y) units²
42) -42
44) a) W = 1.9a + 1.9b + 1.9c
b) 585 lb
46) x² + 9x
48) 2u² - 7u

4. Objective
SWBAT practice simplifying variable expressions and the distributive property

5. Simplifying an Expression
2n – 9 – 4n + 3
2n + (-9) + (-4n) + 3
Write expression as a sum
“Opp-Opp”
2n + (-4n) + (-9) + 3
Commutative Property
-2n + (-6)
COLLECT LIKE TERMS
-2n – 6 or

6. Multiply across Parentheses
Distributive Property
Multiply across Parentheses
3(x + 7) = 3(x) + 3(7)
= 3x + 21
-4(y – 2) = -4(y) + (-4)(-2)
= y + 8

7. Simplify the Expression
A). 3a + 2a + 14
5a + 14
3a + 2(a + 7)
5(b – 9) + 6b – 7
2x – (4x + 9)
-w – 2(3w – 13)
B). 5b – b – 7
11b – 52 or 11b + (-52)
C). 2x – 4x – 9
-2x – 9 or -2x + (-9)
D). –1w + (-6w) + 26
-7w + 26

8. “What Is the World’s Saddest Candy?”
““What Do They Call the International Hula Hoop Championships?”

9. Homework
-Punchline worksheets #30 & #34