Do Now 9/20/12 Take out HW from last night. Take out HW from last night. Text p. 28, #8-24 evens, #17, 35, & 36 Text p. 28, #8-24 evens, #17, 35, & 36.

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Do Now 9/20/12 Take out HW from last night. Take out HW from last night. Text p. 28, #8-24 evens, #17, 35, & 36 Text p. 28, #8-24 evens, #17, 35, & 36 Copy HW in your planner. Copy HW in your planner. Text p. 30, #1-15 all Text p. 30, #1-15 all Quiz sections Wednesday Quiz sections Wednesday Chapter 1 Test Friday Chapter 1 Test Friday In your journal section, list the terms, like terms, coefficients, and constants of the expression below. Then simplify the expression. In your journal section, list the terms, like terms, coefficients, and constants of the expression below. Then simplify the expression. 3x + 17x² x + 4x²

Parts of an Expression 3x + 17x² x + 4x² 1) List the terms of the expression. 2) List the coefficients of the expression. 3) List the like terms of the expression. 4) List the constant terms of the expression. 5) Simplify the expression. 3x, 17x² 7x, 4x², 9 3, 17, 7, 4 3x & 7x, 17x² & 4x² 9 21x² + 10x + 9 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.

Homework Text p. 28, #8-24 evens, #17, 35, & 36 8) 2n and n/4, 6 and 7 8) 2n and n/4, 6 and 7 10) 6³ and 6², y³ and 5y³ 10) 6³ and 6², y³ and 5y³ 12) 12b ) 12b ) 2x + 4y ) 2x + 4y ) d³ + 4d 16) d³ + 4d 18) 9x 18) 9x 20) 4c² + 7c 20) 4c² + 7c 22) 6f² + 2f 22) 6f² + 2f 24) 17p + 27q ) 17p + 27q ) 2n + 3a + 3a+ 2n + 5a; 11a + 4n 17) 2n + 3a + 3a+ 2n + 5a; 11a + 4n 35) D 35) D 36) J 36) J

Objective SWBAT review variables, translating words into math and simplifying algebraic expressions SWBAT review variables, translating words into math and simplifying algebraic expressions

substitute a number for each variable, perform the operations and simplify, if necessary. substitute a number for each variable, perform the operations and simplify, if necessary. To EVALUATE A VARIABLE EXPRESSION- Substitute 3 for n. Multiply. 13· n 13· 3 39 Section 1.3, “Variables and Algebraic Expressions” Section 1.3, “Variables and Algebraic Expressions”

Evaluate the Expression PEMDAS 3(2 + 5) 3(7) 3(49) 3(49) 3(x + y) x = 2 and y = 5 Substitute ² ² ²

Operation Verbal Phrase Expression Addition Subtraction Multiplication Division Add, sum, plus, total, more than, increased by 5 + n k + 12 Subtract, difference, less than, minus, decreased by, take away 12 – p x – 12 Product, times, of, multiplied by 3 x 5 3(d) ab p ∙ k Quotient, divided by, divided into k/7 14 ÷ r + – x ÷ Section 1.4 “Translating Words into Math”

Translate verbal phrases into expressions Verbal Phrase Expression a. 7 less than a number n b. 3 times a number y c. the difference of a number x and the number m n – 7 3y3y3y3y x – m d. the sum of 12.5 and the number c c

3x + 2x + 8 Terms a number, variable, or product of numbers and variables that are always separated by addition signs Coefficient the number part of a variable term Constant term that has no variable Section 1.5 “Simplifying Algebraic Expressions”

Simplifying an Expression 3x + 2x + 8 3x + 2x + 8 Like Terms terms with the same variables raised to the same exponents You can simplify an expression by COLLECTING LIKE TERMS 3x + 2x + 8 3x + 2x + 8 5x + 8 5x + 8

Simplifying an Expression COLLECT LIKE TERMS 4n² + 7n + n² + 9n 4n² + 7n + n² + 9n 5n² + 16n 5n² + 16n 4n² + 1n² + 7n + 9n 4n² + 1n² + 7n + 9n Commutative Property 4n² + 7n + 1n² + 9n 4n² + 7n + 1n² + 9n The coefficient is always 1 for a variable with no number in front of it.

Scavenger Hunt

Homework - Text p. 30, #1-15 all 24