Holtran

I wouldn't bother with parmen. They are just another one of the question bots that occasionally posts answers more atrocious than CPhill's; at least Cheater helper Phill is right most of the time!

Of course you are going to get errors if you can't read or use... hm... less than optimal solution methods. The equation rearranges to \((x-10)(y-10) =100\).

For your first question, what is 360+(-60)? Pay attention in class next time instead of using tools that you do not understand. 

This post fully represents what this site has come to: bot or homework cheater post asinine questions that are answered by other bots or blithering idiots.

The question is not "impossible" - well for the braindead moderators, it is. I wouldn't ask them for the answer as their skill level ends at basic high school math and this entire forum lacks any amount of insight, creativity, and perserverance, all of which is required to solve thie problem. 

This is one of the most blatant homework cheating attempts I've ever seen, but don't worry; I'm sure a kind-hearted homework simp will soon hand you all of the solutions on a silver platter.