marywadesponge

9/18 -integers are whole numbers and thier oppisites.(negative numbers) whole numbers are numbers 1- infinity; ∞.(not negative)

9/22- 21. 10   22.a

9/23- 65. 4.78d+0d= 4.78d 66. -21p- 76p2- 9 +p= -20p - 76 p2 - 9 67. 3.3t2 + 8.7t- 9.4t2 + 5 t=-6.1 68. 1.5m - 4.2m - 12.5v + 4.2m= 1.5m - 12.5v

9/25- page 85(1-3,5-10) 1.-1,9 2.20 3.5 5.120 6.1 7.-1.6  or  -8/5 8.-5+t -5+13=8F 9.1/3(24x - 36) 8x- 12 10.49T

9/26- page 91 (1-4) 1. -(y-4)= 4-y: yes 2. no 3. no 4. no

9/29- summarize associative property and communative property. Associative Property: the movemenet of parentheis to regroup numbers on addition or multiplication problems to produce the same answers. 2+(3+1)=(2+3)+1 Commutative Property: to change the order of the numbers in addition or multiplication expressions to produce the same answer. Example: 2+3=3+2

10/2- pg 116 (15-18) 15. 16k2 16.13xy 17.2t+2 18.9x-4+3x= 12x-4 1. 15/7 + -3/6 90/42  -21/42  69/42    23/14

10/3- page 119 1-9 1. x-5=14 14-5 9 19-5=14  x=19 2. x+3.8=9   5.2+3.8=9  x= 5.2 3. -7+x=7 -7+14=7   x=14 4.x-13= 20 33-13= 20   x=33 5. x/4 = 8  32/4=8 x=32 6. 9=3x 3*3=9  x=3 7. 10x=2 10*1/5= 2   x=1/5 8. 2/3x=-6 2/3*-9=-6   x=-9 9.x+ 3/4 = 6 1/2   x= 3 3/4

10/6- pd 122(40-43) 40.8+c/-4=-6 c=56  8+56/-4=-6 41. -3k+7=-14 k= 7    7-3*7=-14 42. 2p-6=14 p=-4 3 43.-y/2+14=-1 y= 30