anonymous
  • anonymous
.... Help !
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
|dw:1348247458539:dw|
anonymous
  • anonymous
Solve For r
anonymous
  • anonymous
Is that all you are given in the problem, or is there more?

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anonymous
  • anonymous
Thats All .
anonymous
  • anonymous
incomplete information
anonymous
  • anonymous
No, it is ok... right now, it is "solved" for C... you need to get "r" all by itself instead.
anonymous
  • anonymous
How Do I Do That Tho ?
anonymous
  • anonymous
If you divide both sides of the equation by 2pi, the right side simplifies to just "r"
anonymous
  • anonymous
exactly
anonymous
  • anonymous
|dw:1348247556863:dw|
anonymous
  • anonymous
u just need values of r
anonymous
  • anonymous
|dw:1348074883290:dw|
anonymous
  • anonymous
So its C-2pi=r ?
anonymous
  • anonymous
whatever the vaue of r is put in that formula and pi has value 3.14
anonymous
  • anonymous
There is no Value of R
anonymous
  • anonymous
if you don't have a value of r, that's fine... "solving for r" just means writing the expression down in a way where it starts like "r = "
anonymous
  • anonymous
so, r = C / (2pi) is solving your original expression for "r"
anonymous
  • anonymous
Isnt it Negative tho ?
anonymous
  • anonymous
why would it be negative?
anonymous
  • anonymous
|dw:1348247883645:dw|
anonymous
  • anonymous
To Be Able To Get It To The Other Side .
anonymous
  • anonymous
no, you don't subtract anything... don't let the 2pi term confuse you
anonymous
  • anonymous
Ohh Okay . Gosh Its Confusing .
anonymous
  • anonymous
Think of easier stuff like this... if I said C = 5r, solve for r, you would divide both sides by 5, leaving you with C/5 = r, or you could just reverse it and answer r = C/5
anonymous
  • anonymous
Ohh Well That Makes Sense . So Basicly The Answers ; R=C2pi ?
anonymous
  • anonymous
2pi is just some number... happens to be a little more than 6 since pi is about 3.14, but don't even worry about that.... just divide both sides by "2pi". On the r side, the 2pi divides out and "goes away" :)
anonymous
  • anonymous
Oooh Okay(:
anonymous
  • anonymous
R = C / 2pi you divide C by 2pi, just like you divided (2pi)(R) by 2pi to get just R
anonymous
  • anonymous
o.o Wait . How do i divide it by C ?
anonymous
  • anonymous
What class/grade are you in?
anonymous
  • anonymous
Algebra 1 & FreshMan
anonymous
  • anonymous
ok, cool
anonymous
  • anonymous
Lol Yeah .
anonymous
  • anonymous
& You ?
anonymous
  • anonymous
so, any equation like y = 2x can be rewritten by dividing both sides of it by the same thing... for example, divide both sides of y = 2x by 2..... y = 2 x (y/2) = (2x)/2 y/2 = x This starts with an expression of y and "solves it for x"
anonymous
  • anonymous
Ohhh . Well Thanks For All The Help ! It Is Very Very Appreciated(:
anonymous
  • anonymous
you need the same idea with C = (2pi)R C = (2pi)R C/2pi = [ (2pi)(R) ] / (2pi) C/2pi = R <<<--- because the 2pi cancels out
anonymous
  • anonymous
No problem... btw, I graduated... just like math and helping :) Keep up the good work :)
anonymous
  • anonymous
Ohh Very Cool . (: & Ima Try Lol .

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