My understanding it would be letter ( i ) because it is imaginary.
Answer:
9 x 4 = 36 divided by 2 = 18
It's D, it's the only one where it has a -6 at the end other than A, but if you look at the A when distributed there isn't a 23x<span />
The area is 84.
What I do it cut the polygon into something easier like a square and rectangle.
Rectangle: 6•12=72
Square: 4•3=12
Add them together and you have 84
