ChristinSponge

Christin Grulke

9/18/08-What is the difference between an integer and a whole number? an integer is whole number and their opposites an whole number is not a decimal or fraction and are between 1 and infinity

9/22/08-page 83 problems 65-68 65. 4.78d **correct** 66. -20p-76p^2-9 **correct** 67. 12.7t^2+43.5t **13.7t-6.1t^2** 68. 9.9m+12.5v **1.5m-12.5v**

9/23/08-No Class

9/24/08-page 85 problems 1-3, 5-10 1. (-1/3)+(2/9)=(-3/9)+(2/9)=-3+2=-1=-1/9 **correct** 2. -3+(-17)=-20 **correct** 3. |-5|+(-5)+5=|5|+(-5)+5=5 **correct** 5. 2a*(-3b)=2(4)*(-3*-5)=8*(15)=120 **correct** 6. -b-a=-5-4=-9 **1** 7. (2a²)÷(4b)=(2*4²)÷(4*-5)=(2*16)÷(20)=32÷20=1.6 **-1.6** 8. t=temperature -5+t **8°F** 9. **8x-12** 10. **49t**

9/25/08-page 91 problems 1-4 1. -(y-4) and 4-y -1*y--1*4=-1y+4 not equal **equal** 2. 8+5m and 8+5+m 13+m not equal **correct** 3. 2(t-7) and 7(t-2) not equal **correct** 4. 4(2b-3) and 2[2(a-6)] and 2(a-18) not equal **correct**

9/26/08-summarize the associative property and commutative property The commutative property is when you can change the order of the numbers and you get the same answer. It only works on addition and multiplication not subtraction and division. 3+4+5=3+5+4 3*4*5=3*5*4 **correct** The associative property is when you can change what numbers are in the parenthesis and you get the same answer. It only works on addition and multiplication not subtraction and division. 3+(4+5)=(3+5)+4 3*(4*5)=(3*5)*4 **correct**

9/29/08-Test

9/30/08-No Class

10/1/08-page 116 problems 15-18 15. 14k²-(-2k²) 14k²+2k²=16k² 16k² **correct** 16. 4xy+9xy 13xy **correct** 17. 6t+2-4t 6t-4t=2t 2t+2 **correct** 18. 9x-4+3x 9x+3x=12x 12x-4 **correct** 1. 15/7+-3/6 90/42+-21/42=69/42 **correct**

10/2/08-page 119 problems 1-9 1. x-5=14 14+5=19 x=19 (19-5=14) **correct** 2. x+3.8=9 9-3.8=5.2 x=5.2 (5.2+3.8=9) **correct** 3. -7+x=7 7--7=14 x=14 (-7+14=7) **correct** 4. x-13=20 20+13=33 x=33 (33-13=20) **correct** 5. x/4=8 8•4=32 x=32 (32/4=8) **correct** 6. 9=3x 9÷3=3 x=3 (9=3*3) **correct** 7. 10x=2 2÷10=1/5 x=1/5 (10*1/5=2) **correct** 8. 2/3x=-6 6÷2/3=-9 x=-9 (2/3*-9=-6) **correct** 9. x+11/4=13/2 13/2-11/4=26/4-11/4=15/4 x=15/4 (15/4+11/4=13/2) **correct**

10/3/08-page 122 problems 40-43 40. 8+c/-4=-6 -6-8=-14 c/-4*-4=c -14*-4=56 c=56 (8+56/-4=-6) **correct** 41. 7-3k=-14 -14-7=-21 -3k/-3=k -21/-3=7 k=7 (7-3*7=-14) **correct** 42. 14=6-2p 14-6=8 -2p/-2=p 8/-2=-4 p=-4 (14=6-2*-4) **correct** 43. -y/2+14=-1 -1-14=-15 -y/2•2=-y -15•2=-30 -y=-30 -y*-1=y -30*-1=30 y=30 (-30/2+14=-1) **correct**

10/6/08-page 134 problems 5-8 page 29 problem 29 5. 4x+3=-5 -5-3=-8 4x=-8 4x/4=x -8/4=-2 x=-2 (4*-2+3=-5) **correct** 6. -x+7=12 12-7=5 -x=5 -x/-1=x 5/-1=-5 x=-5 (-5+7=12) **correct** 7. 2t-8t+1=43 -6t+1=43 43-1=42 -6t=42 -6t/-6=t 42/-6=-7 x=-7 (-6*-7+1=43) **correct** 8. -7n+4-5n=0 -12n+4=0 -12n=-4 -12n/-12=n -4/-12=1/3 n=1/3 (-12*1/3+4=0) **correct** 29. 1/5+3w/15=4/5 3/15+3w/15=12/15 12/15-3/15=9/15 3w/15=9/15 3w=9 3w/3=w 9/3=3 w=3 (3/15+3*3/15=12/15) **correct**