The answer is C because if you substitute in X-6 for the y in the first equation (since X-6 is also equal to y), you get 2x=16 which means x=8. There is only one option where 8 is equal to X, but just to check you can substitute it back into either of the original equations to make sure that y=2.
A-1.5 yards
We can figure this out by using the formula of inches to yards. Which is divide by 36 so 54/36 is 1.5. So that is how the answer is solved.
I hope this helps!