(15)simplify the expression below. show your work +12)
i need to get this done before a dead line today
(16) solve the equation show your work
1 6
_ = _
a 18
(17) solve the equation show your work 8x -12 = 4x + 24
(18) solve the inequality show your work -6b > 42 or 4b > -4
(19) write an algebraic expression for the phrase: 6 more than the product of 8 and n.
last question (20) solve the equation show your work 45 = 3b + 69
!

15. -(-7y + 12) = 7y - 12

16. 1/a = 16/18
      cross multiply
      16a = 18
      a = 18/16 = 9/8

17. 8x - 12 = 4x + 24
      8x - 4x = 24 + 12
      4x = 36
      x = 36/4
      x = 9

18. -6b > 42           4b > -4
       b < 42/-6          b > -4/4
       b < - 7              b > -1
so b < -7 and b > -1

19. 6 more then the product of 8 and n
      6 + 8n

20. 45 = 3b + 69
      45 - 69 = 3b
      -24 = 3b
      -24/3 = b
      -8 = b

The domain is -1, 0, 1, 2, 3. Domains are always the independent variable <3 !