MeiSponge

Mei Landskroener

09/22/08 - pg.83 (65-68)

65) 4.78d +0d      4.78d

66) -21p-76p^2      -20p - 76p^2 - 9

67) 3.3t^2 + 8.7t - 9.4t^2 + 5t      -6.1t^2 + 13.7t

68) 1.5m - 4.2m -12.5v + 4.2m      1.5m - 12.5v

09/23/08 - NO SPONGE NO CLASS

09/24/08 - pg.85 (1-3,5-10)

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 x (-3b)   2(4) x (-3b)    8 x 15    120

6) -b - a   5 - 4    1

7) (2a^2) / (4b)    [2(4)^2] / [4(-5)     -1.6

09/25/08 - pg.91 (1-4)

1) -1(y - 4) = 4 - y    yes

2) 8 + 5m = 8 + 5 + m    no

3) 2(t-7) = 7(t-2)    no

4) 4(2b - 3) = 2[(2 - 1)b - 2]    no

09/26/08 - Summarize the Associative Property and the Commutative Property in complete sentences and use examples

Associative Property

Any number can be inside or outside the parenthesis when using multiplication or addition will still get the same answer 8 + (6 + 3) = (8 + 6) + 3 8 x (6 x 3) = (8 x 6) + 3

Commutative Property

No matter what order a multiplication or addition problem is in it will still get the same answer 8 + 6 = 6 + 8 8 x 6 = 6 x 8

09/29/08 - No sponge

09/30/08 - No sponge No class

10/01/08 - pg.116 (15-18)

15) 14k^2 - (-2k^2)      16k^2

16) 4xy + 9xy      13xy

17) 6t + 2 - 4t      2t + 2

18) 9x - 4 + 3x      12x - 4

1) 15/7 + -3/6    90/42 + -21/42     69 /42

10/02/08 - pg. 119 (1-9 check skills)

1) x - 5 = 14   14 + 5     x = 19

2) x + 3.8 = 9    9 - 3.8     x = 5.2

3) -7 + x = 7    7 + 7     x = 14

4) x - 13 + 20   20 + 13     x = 33

5) x/4 = 8   8 x 4    x = 32

6) 9 = 3x   9 / 3    3 = x

7) 10x = 2    2 / 10      x = 1/5

8) 2/3x = -6    -6 / 2/3     x = -9

9) x + 2 3/4 = 6 1/2   6 1/2 - 2 3/4    x = 15/4 = 3 3/4

10/03/08 - pg.122 (40 - 43)

40) 8 + c/-4 = -6      c/-4 - 8 = -6 - 8       c/-4  x -4 = -14 x -4       c = 56

41) 7 - 3k = -14      3k - 7 = -14 - 7       3k / 3 = -21 / 3       k = 7

42) 14 = 6 - 2p      14 - 6 = -2p - 6       8 / -2 = -2p / -2       -4 = p

43) -1y/2 + 14 = -1      -1y/2 - 14 = -1 - 14       -1y/2 x 2 = -15 x 2       -1y / -1 = -30 / -1       y = 30

10/06/08 - pg.134 (5-8 check skills) pg. 129 #29 5) 4x + 3 = -5   -5 - 3 = -8    -8 / 4 = -2    x = -2

6) -1x + 7 = 12    12 - 7 = 5     5 / -1 = -5     x = -5

7) 2t - 8t + 1 = 43    43 - 1 = 42     42 / -6 = -7     t = -7

8) 0 = -7n + 4 - 5n     0 - 4 = -4     -4 / -12 = .3

29) 1/5 + 3w/15 = 4/5