Your answer is 9.
Since you have
2(2)^2 you get 2(4) which is 8.
Then you have -3(2) which is -6.
Lastly you have the 7.
When you add it up you get.
9
We know, Sin Ф = P / H
Here, P = 18, H = x
So, Sin 34 = 18 / x
x = 18 / Sin 34
x = 18 / 0.559
x = 32.19
In short, Your Answer would be Option A
Hope this helps!
Proof<span> by contradiction........... </span>
