1. Evaluate x + ( -2 ) when x = 10 * 12 8 -8 2. 3a + 9a = ___ * 12a 6a 5a 3. 6mn - 5mn = __ * 11mn mn -mn 4. Evaluate 7x -2y when x = 2 and y= 1 * 10 11 12 5. 7

1. Evaluate x + ( -2 ) when x = 10 *
12
8
-8
2. 3a + 9a = ___ *
12a
6a
5a
3. 6mn - 5mn = __ *
11mn
mn
-mn
4. Evaluate 7x -2y when x = 2 and y= 1 *
10
11
12
5. 7p + 8p - 10p = ___
25p
15p
5p
6. 6xyz - (- 2xyz) = ___ *
4xyz
-4xyz
8xyz
7. ( 8p - 4r) + ( 6p + 3r ) = _____ *
14p - r
14p + r
14p -7r
8. ( 12 a + 10b - 6 ) - ( 8a - 3b - 9 ) = ____ *
20a +7b + 15
4a +13b + 3
4a -13b - 3