[cracked]

i have a math test tomorrow. of course i have studied non whatsoever so im gonna do bad on it but i got a question.

in my book it has problems like the following:

||v||=something blah blah where v is like a vector or something

i know that |x| means absolute value of the variable but what does ||x|| with two bars on each side mean? thanks a lot, i needed the help...

ps. anyone know of a good math homework help (alg. III, trig, precalculus) website that is free? i could really use one as my teacher is the stereotypical teacher from hell (he isnt mean but he should be fired for lack of teaching skills). my book isnt much help at all either. thanks!

Cr/-\c|<e|)