Josh had 200 dollars to begin with. He just spent k dollars. Using k, write an expression for the number of dollars he has left.

200-k is not that hard

Sorry i don't really know and i don't have time

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.