.... Help !

- anonymous

.... Help !

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- anonymous

|dw:1348247458539:dw|

- anonymous

Solve For r

- anonymous

Is that all you are given in the problem, or is there more?

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## More answers

- anonymous

Thats All .

- anonymous

incomplete information

- anonymous

No, it is ok... right now, it is "solved" for C... you need to get "r" all by itself instead.

- anonymous

How Do I Do That Tho ?

- anonymous

If you divide both sides of the equation by 2pi, the right side simplifies to just "r"

- anonymous

exactly

- anonymous

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- anonymous

u just need values of r

- anonymous

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- anonymous

So its C-2pi=r ?

- anonymous

whatever the vaue of r is put in that formula
and pi has value 3.14

- anonymous

There is no Value of R

- 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

so, r = C / (2pi) is solving your original expression for "r"

- anonymous

Isnt it Negative tho ?

- anonymous

why would it be negative?

- anonymous

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- anonymous

To Be Able To Get It To The Other Side .

- anonymous

no, you don't subtract anything... don't let the 2pi term confuse you

- anonymous

Ohh Okay . Gosh Its Confusing .

- 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

Ohh Well That Makes Sense . So Basicly The Answers ; R=C2pi ?

- 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

Oooh Okay(:

- anonymous

R = C / 2pi you divide C by 2pi, just like you divided (2pi)(R) by 2pi to get just R

- anonymous

o.o Wait . How do i divide it by C ?

- anonymous

What class/grade are you in?

- anonymous

Algebra 1 & FreshMan

- anonymous

ok, cool

- anonymous

Lol Yeah .

- anonymous

& You ?

- 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

Ohhh . Well Thanks For All The Help ! It Is Very Very Appreciated(:

- 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

No problem... btw, I graduated... just like math and helping :) Keep up the good work :)

- anonymous

Ohh Very Cool . (: & Ima Try Lol .

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