Jennysponge

Jenny Whitley

page 85 1-3, 5-10 September 25, 2008 1. (-1/3) + (2/9)   ( -3/9) + (2/9)     -1/9

2. -3 + (-17)    -20

3. |-5| + (-5) +5    5+ (-5) + 5      5

5. 2a * (-3b) 2(4) * (-3(-5)   8 * 15    120

6. -b - a   5 - 4 1

7. (2a²) / (4b) (2(4²)) / (4(-5))    32/ -20      -1.6

8. t= change in temperature -5 + t  8 degrees

9. 8x-12

10. 49t

September 26, 2008 Page 91

put a number in for the variable or use a property to simplify 1.yes 2. no 3. no 4. no

September 26, 2008 Summarize the Associative Property and the commutative property in complete sentences- use examples

The Associative property is the movement of parenthesis to regroup numbers in a addition or multiplications problems to produce the SAME answers. ex- a+(b+c) --> b+(a+b)

The commutative property is to change the order of numbers in an addition or multiplication expression to produce the SAME answer. ex- A+B=B+A

October 2, 2008 Page 116 ( 15-18), plus extra question

1. 15/7 + -1/2 15/14 + -1/14 16/14 --> 1 2/14

15. 14k² + (2k²)= 16k⁴

16. 4xy+9xy= 13xy

17. 6t+2-4t=10t+2

18. 9x-4+3= 9x-7

October 3, 2008 Page 119( 1-9)

1. x=19 2.x= 5.2 3. x=14 4. x=33 5. x=32 6. x=3 7. x= 1/5 8. x=-9 9. x=3 3/4

October 6, 2008 Page 122 (40-43)

40. 8 + c/-4 = -6 c/-4 = 14 c= 56

41. 7-3k=-14 -3k= -21 k= 7

42. 6-2p=14 2p=8 p=-4

43. -y/2 + 14= -1 -y/2 = -15 y=30