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# (3n3 + 2n2) + (4n3 - n2) (answer)

Hi Jaimi,    This looks like a classic case of "combining like terms."  Since there is no multiplication or division within the parentheses, you can just remove them.  Then, add 3n3 + 4n3 and subtract 2n2 - n2.  So, what do you get?   7n3 + n2.  (The convention is to write the variables with...

# What are some tips for coming up with a good thesis for a paper? (answer)

Oooooo . . . nice question with lots of different possibilities.  Now, I'm assuming that that you're talking about a thesis for an argumentative essay (It would different for an expository essay, say).  Here's the short and sweet: start extreme and then become more nuanced (subtle or detailed)...

# what does it mean when an anghle is equal to itself? (answer)

It is just another fancy way of saying "You are as old as you are," or "You are as tall as you are."  No matter how old or how tall you are, you will always be the same age and height as yourself, now won't you? Basically, it's like looking into a standard mirror (not a funhouse mirror) and...

# Does a straight angle have a vertex? (answer)

Oh yes!  Any point you choose.  They are all potential vertices. What I mean is that since a line has an infinite number of points, they are all potential vertices.  In terms of your particular problem: A line is always defined (named) after 2 points on it.  An angle is always named after 3...

# Find the square of the length of the diagonal of a square whose area is 16 cm2 (answer)

Hmmm . . .  Let me venture to say that one of these other tutors is correct and the other is incorrect.  This word problem (like the ones found in the SAT Math section) is a case of reading comprehension -- reading the problem CAREFULLY! Let's get started:  A square, by definition, has sides...