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**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

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**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

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**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

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Objective SWBAT practice simplifying variable expressions and the distributive property

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**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

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**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

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**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

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**“What Is the World’s Saddest Candy?”**

““What Do They Call the International Hula Hoop Championships?”

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Homework -Punchline worksheets #30 & #34

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