Note that the words "function" and "domain" in your question have been turned into links for information about those topics. You might start there!
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The form of this answer reminds me of another problem, which in turn suggests an entirely different way to solve the problem. Now that we have dealt...
You're doing fine so far. Just keep going! (Well, I see one error, in that you moved a parenthesis in the last line, writing (90n - 180/n) instead of...
Correct. You dropped (that is, changed to zero) the ones place, making 4560, and then added 1 to the tens place because of the 7: 4560 + 10 = 4570.
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Perhaps you are misinterpreting something. If you continue the pattern, you definitely get a regular polygon as they say, because all angles are the...
I was a software engineer for many years, and have been teaching at a community college since 2004. Since 1998, I was a part of Ask Doctor Math (http://mathforum.org/dr.math/ and now http://themathdoctors.org/).