Directions: Simplify each expression by combining like terms

1.) - y+9z-16y-25z

2.) 6x + 3y-y+2+2

3.) 9b + 5 (b - 4) + 15

4.) - 4 (3x + 5) + 10x + 1

5.) 0.5 (y + 4) + 18y - 9

6.) - 0.7r+9 (-r-15)

Answers:

1.) - y+9z-16y-25z = - 17y-16z

2.) 6x + 3y-y+2+2 = 6x+2y+4

3.) 9b + 5 (b - 4) + 15 = 14b-5

4.) - 4 (3x + 5) + 10x + 1 = - 2x-19

5.) 0.5 (y + 4) + 18y - 9 = 18.5y-7

6.) - 0.7r+9 (-r-15) = - 9.7r-135