Hello everyone! Thank you all for your time. I'm trying to freshen up for the upcoming school year with math stuff (my worst subject), and theres several concepts I just can't get down. If someone could explain how you arrived at the answer that would be tremendous, thanks!

(1)The first concept is seen with the equation 14!/1!13!. I just don't understand what I'm supposed to be doing with it.

(2) The next one seemed at first easy to me, but I keep getting it wrong. It simply shows 5x=2. Now I thought I'd simply divide both sides by 5, and get x=2/5, but the answers all have the letter "e" in it. I have no idea why though

and lastly, (3) I don't know how to find all the possible number of imaginary zeros of

*f*(

*x*) = 2

*x*3 - 4

*x*2 + 8

*x* - 3 I think I just don't do well with the more odd numbers (i, !, and so on). Thank you very much, I hope this isn't to much of a bother. Thanks!

-Cillian3