ok, i dont know if im doing this right so i just need it checked by someone who is familiar with the subject.
http://img180.imageshack.us/img180/2673/30971384nh8.jpg
I'm not sure im doing it right, and since X=47 does that mean the red car's speed is 47miles per hr?
using the theorem we get...
taking the square root of both sides
We want only the positive root
Good luck.
as for the La tex try this link
http://en.wikipedia.org/wiki/Help Formula
yeap, thats what i got for the 46.96, and i rounded it off to 47. But since
x=47 that means the red car's speed is 47 m/hr? Or do i have to times it by two since the word problem says that "the red car's speed is twice the blue car's speed" or do i divide 47 by half to get the speed of the blue car.
ok i get it now. i did everything you did except where you took (21 X 5)squared
I just took the 105 and squared it, combined the like terms, isolated X by divining both sides by 5 and then finally took the square root of both sides to get the X squared alon and ended up with the rounded off 47. Thanks alot.