Suppose a ski cabin rental cost $225 per night. additionally, each cabin rental also has a one time $50 recreational equipment fee. which equation models the cost, c, for staying n nights at the ski cabin?

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.