someone help me with these two question please?

Which of the following is equivalent to (6x + 8x + 2) - (2x + 9) *

16x + 11
12x - 7
4x - 9
12x - 18

Which is equivalent to 6xz - 15yz + 9z? *

(2x - 5)(3z + 4)
(x - 5)(6z + 4)
3z(2x - 5y + 3)
3(2xz - y + 3)

Question

someone help me with these two question please? 



Which of the following is equivalent to (6x + 8x + 2) - (2x + 9)  *

  16x + 11 
 12x - 7 
 4x - 9 
 12x - 18 







Which is equivalent to 6xz - 15yz + 9z?  *

  (2x - 5)(3z + 4) 
 (x - 5)(6z + 4) 
 3z(2x - 5y + 3) 
 3(2xz - y + 3)

anonymous · Answer

Okay, the first step in the first one is to multiply both sides of the right side of the equation by -1. So now you have -2x - 9.

anonymous · Answer

Now combine like terms. the x's can go together to make 12x, and the normal numbers can go together to make -7. The answer is 12x - 7.

anonymous · Answer

Now for the second one, multiply every answer until you get one that matches up. The answer will be C. :)

anonymous · Answer

ohhhh... okay that  was easy