Isabel.A 3 years ago .... Help !

1. Isabel.A

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2. Isabel.A

Solve For r

3. JakeV8

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

4. Isabel.A

Thats All .

5. nustian

incomplete information

6. JakeV8

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

7. Isabel.A

How Do I Do That Tho ?

8. JakeV8

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

9. nustian

exactly

10. JakeV8

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11. nustian

u just need values of r

12. nustian

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13. Isabel.A

So its C-2pi=r ?

14. nustian

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

15. Isabel.A

There is no Value of R

16. JakeV8

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 = "

17. JakeV8

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

18. Isabel.A

Isnt it Negative tho ?

19. JakeV8

why would it be negative?

20. Isabel.A

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21. Isabel.A

To Be Able To Get It To The Other Side .

22. JakeV8

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

23. Isabel.A

Ohh Okay . Gosh Its Confusing .

24. JakeV8

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

25. Isabel.A

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

26. JakeV8

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" :)

27. Isabel.A

Oooh Okay(:

28. JakeV8

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

29. Isabel.A

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

30. JakeV8

31. Isabel.A

Algebra 1 & FreshMan

32. JakeV8

ok, cool

33. Isabel.A

Lol Yeah .

34. Isabel.A

& You ?

35. JakeV8

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"

36. Isabel.A

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

37. JakeV8

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

38. JakeV8

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

39. Isabel.A

Ohh Very Cool . (: & Ima Try Lol .