Do Now 9/7/10 Copy HW in your planner.  Text p. 5-7, #4-52 multiples of 4 In your journal, answer the following question. How do you evaluate algebraic.

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Evaluating Expressions

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Do Now 9/7/10 Copy HW in your planner.  Text p. 5-7, #4-52 multiples of 4 In your journal, answer the following question. How do you evaluate algebraic expressions and powers? Then solve the example, when n = 4.

Objective SWBAT evaluate algebraic expressions and use exponents

Section 1.1 “Evaluate Expressions” VARIABLE a letter used to represent one or more numbers. a e m k y s t

substitute a number for each variable, perform the operations and simplify, if necessary. To EVALUATE AN ALGEBRAIC EXPRESSION- Substitute 3 for n. Multiply. = n = 13 3

Subtract. = 2 Substitute 3 for n. = 3 Divide. Evaluate the expression when n = a. 9 n = b. n – 1 = 3 – 13 – 1 Substitute 2 for y. Multiply. = 12 Evaluate the expression when y = 2. c. 6 y = 6 2 Add. = 6 Substitute 2 for y.. d. y + 4 = 2 + 4

POWER an expression that represents repeated multiplication. 2 4 BASE EXPONENT Product Words two to the fourth power

GUIDED PRACTICE Evaluate the expression. 1. x 3 when x = 8 1. x 3 = 8 3 = 512 = (2.5)(2.5)(2.5) = = k 3 = k 3 when k = d 4 when d = d 4 = ( ) = = 1 81

Homework Text p. 5-7, #4-52 multiples of 4

D105 Classroom Scavenger Hunt