Its the second one. The inverse is the opposite of the original
Im not an expert or anything, but i think for the innequality, i would say

as far as the amount of people she can invite, do 500-100=400 because of the setup fee, then, to find how many people she can invite. 400÷6.50 which leaves you with the highest amount of people she can invite without going over budget, as 61.
6 bowls. 6 is the GCF (Greatest Common Factor) of the three numbers.
There are 3 shorter boards because if you divide 27 by 9 it equals 3.
The congruent figures will have all measurements equal.
So these are parallelograms.