I just have a few questions I don't quite understand. Hope you guys can help me.

Calculate the

distance between each of the following pairs of points.

1) I(8,2) and J(-2,-3)

This means find the slope of the two points right?

Mr F says: Wrong! It means find the **distance**.
My final answer (finding the slopes) was

. Is that right? Is it even slope at all or is it something completely different.

Mr F says: Does the question mention slope? No. So even though that actually is the correct slope, it's the wrong answer. Does the question mention distance? Yes. The formula is .
2) If the line joining A (a,4) and B (2,3) is parallel to the line joining C (-5,3) and D (1,1), find the value of a.

I am guessing to do this you must find the slope then the y or x intercepts?

Mr F says: Half right. Find the slope of the line passing through C and D. I know you can find slope because you found the correct slope between the points given in question 1 (pity the question wasn't asking for slope). Now find the slope of the line passing through A and B. It will have a in it. Now put the two slopes equal to each other and solve for a.
3) The express

is equivalent to...

It's been so long since I did radicals I have no idea why the teacher would put this on the test... anyways, I'm at a complete blank. From mixed radical to the radical that isn't mixed (Lol, I'm that lost, forgot the name...), it's square the mixed number then add it to the one in the square root right? So

will become \sqrt{38}[/tex]. Right? Wrong?

Mr F says: Wrong for two reasons: 1. It becomes . NOT !!! 2. They probably want you to **simplify** the expression, in which case you need to reduce .
If right, then thanks I know how to solve the problem. If wrong, please tell me the right way :P

Mr F says: . So is equivalent to .
Thanks for the help guys.

Mr F says: Just hit the thanks button, dude.