It would be associative property because the order of the numbers stayed the same
The answer to the question is A
I do not know how to show the working out but its 4+6+6
Answer:
x= 20 i think sorry if it's wrong⊙﹏⊙
Answer: Choice D) 
The steps to finding the inverse will have us swap x and y. Afterward, we solve for y
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Extra info:
The inverse relation is not a function because of the plus minus. For instance, plugging x = 4 into leads to y = -3 and y = 3 simultaneously. You would have to apply a domain restriction on 
to make it a one-to-one function, to make the inverse a function. One possible domain restriction is 
which would lead to the inverse function 
