Ch. 4.2 Hexagons

13
Agenda Tuesday, Nov. 17 homework    7    p. 188 # 18 - 23 ?questions on project? Save all your work in a Thanksgiving Project folder and share with me all at once. correct homework More practice with order of operations and evaluating expressions with exponents. 

Transcript of Ch. 4.2 Hexagons

Page 1: Ch. 4.2 Hexagons

Agenda Tuesday, Nov. 17

homework    7    p. 188 # 18 ­ 23

?questions on project?Save all your work in a Thanksgiving Project folder and share with me all at once.

correct homework

More practice with order of operations and evaluating expressions with exponents. 

Page 2: Ch. 4.2 Hexagons

p. 182 # 22 - 30

Is the number divisible by 2, 3, 5, 9, or 10?22. 111

23. 131

24. 288

25. 300

26. 52

27. 891

28. 4,805

29. 437,684

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30. a. which numbers are divisible by 2 and 3?10 66 898 4,710 975

p. 188

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Page 7: Ch. 4.2 Hexagons

­x4 means the opposite of x to the fourth power

(­x)4 means negative x to the fourth power

Evaluate  each for x = 2

­24  = ­2 * 2 * 2 * 2 = ­16

(­2)4  = (­2)(­2)(­2)(­2) = 16

You try:  Evaluate ­x4 and (­x)4, for x = 3

­x4 = ­34 = ­3 * 3 * 3 * 3 = ­81

(­x)4 = (­3)4 = (­3)(­3)(­3)(­3) = 81

ifa negative sign is NOTin

parenthesis, the answer

is Alwaysnegative

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Using Order of Operations

Simplify  2(3 + 4)2

2(7)2

Parenthesis2*49

Exponents 98

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Your turn.

1. Simplify   2 * 52 + 4 * (­3)3

   2 * 25 + 4 * ­27      50 + ­ 108

     ­58

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Evaluate ­3x3 + 4y for x = (­2) and y = 4

­3(­2)3 + 4 * 4

­3 * ­8 + 4 * 4        24 + 16

40

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2. Evaluate   3a2 + 6, for a = ­5

3(­5)2 + 6 3 * 25 + 6    75 + 6

  81

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Simplify

- 82

+ (12 - 14)

-4 + (-2) -6

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