Answer:
1000
Step-by-step explanation:
x = 1, y = -1, and z = 2
7/18 because 7 times 1 is 7 and 9 times 2 is 18 :)
I got 3x^2 + 12x + 4. I recommend you verify my answer, so you have to combine like terms in the first expression then add all the expressions.
What is the actual question? I know what you're trying to say, just it's not enough info...