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Do Now 9/7/10

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.

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Do Now 9/7/10

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  1. 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.

  2. Objective • SWBAT evaluate algebraic expressions and use exponents

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

  4. 13n= 133 To EVALUATE AN ALGEBRAIC EXPRESSION- substitute a number for each variable, perform the operations and simplify, if necessary. Substitute 3 for n. = 39 Multiply.

  5. 62 9 a. 3 9 n Evaluate the expression when n =3. = Substitute 3 for n. = 3 Divide. b.n–1= 3–1 Substitute 3 for n. = 2 Subtract. Evaluate the expression when y =2. c.6y= Substitute 2 for y. = 12 Multiply. d.y+4= 2+4 Substitute 2 for y.. = 6 Add.

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

  7. 3. d4 whend = 1 1 1 1 1 4 ( ) 1 3. d4 = 3 3 3 3 3 3 =8 8 8 = 1 = 81 GUIDED PRACTICE Evaluate the expression. 1. x3 whenx = 8 2. k3 whenk = 2.5 1. x3 = 83 2. k3 =2.53 = (2.5)(2.5)(2.5) = 15.625 = 512

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

  9. D105 Classroom Scavenger Hunt

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