P = 2 times pie times r + 2x
Slove to r
P = 440yd
x = 110yd
everytime i do this i get a different answer ... what do you get?
2007-02-01 13:38:51 · 6 answers · asked by *Sweetie* 3 in Science & Mathematics ➔ Mathematics
times = multiply
opps solve FOR r
2007-02-01 13:40:05 · update #1
*Pie is about "3.14" >>>
440 = (2)(3.14)(r) + 2(110)
440 = 6.28r + 2(110)
440 = 6.28r + 220
Sec: subtract "220" from both sides...
440 - 220 = 6.28r + 220 - 220
220 = 6.28r
Third: isolate "r" on one side --- divide both sides by 6.28"...
220/6.28 = 6.28r/6.28
35.03 = r
r = 35.03
2007-02-01 13:54:38 · answer #1 · answered by ♪♥Annie♥♪ 6 · 1⤊ 0⤋
Are you doing the same way each time?
Just write down the first equation
P = 2 pi r + 2x
Then write it again, but change "P" to 440, and "x" to 110
440 = 2 pi r + 2 times 110
Do the arithmetic
440 = 2 pi r + 220
Subtract 220 from each side.
Then divide each side by 2
Then divide each side by pi (you might need a calculator for this step).
You should get:
(some number) = r
2007-02-01 21:45:06 · answer #2 · answered by morningfoxnorth 6 · 0⤊ 2⤋
p=2 x pie x r x 2x
440=2 x pie x r x 2 x 110
r=440 / 2 x pie x r x 2 x 110
r=440 / 440 x pie
r= pie
2007-02-01 21:48:57 · answer #3 · answered by JJ 2 · 0⤊ 2⤋
440 = 2x3.14(r) + 2(110) = 6.28(r)+220
220 = 6.28(r)
220/6.28 = r
2007-02-01 21:42:42 · answer #4 · answered by koolkat 3 · 1⤊ 1⤋
I'm really smart on stuff, I just helped a weirdo on fractions, I'm only in 3rd grade. =[ sorry.
//Callie
2007-02-01 21:43:49 · answer #5 · answered by Sunset :]] 4 · 1⤊ 2⤋
im not sure if this is right so unless your sure sont trust me for sure lol but i got 13.8160
2007-02-01 21:50:07 · answer #6 · answered by dot_ridr 2 · 0⤊ 2⤋