SOLUTION: What is the radius if the circumference is: 4x-10pi (5/2)pi 14pi (x + y)pi I have previously completed these problems. However, my answers were deemed incorrect.

Question 306405: What is the radius if the circumference is:
4x-10pi
(5/2)pi
14pi
(x + y)pi
I have previously completed these problems. However, my answers were deemed incorrect. I would be grateful for assistance. Cheers!
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
C=2PI*R
4x-10pi
4X-10PI=2PI*R
(4X-10PI)/2=PI*R
2X-5PI=PI*R
R=(2X-5PI)/PI ANS.
-------------
(5/2)pi
5PI/2=2PI*R
R=(5PI/2)/2PI
R=(5PI/2)(1/2PI)
R=5PI/4PI
R=5/4 ANS.
-------------
14pi
14PI=2PI*R
R=14PI/2PI
R=7 ANS.
------------
(x + y)pi
(X+Y)PI=2PI*R
R=(X+Y)PI/2PI
R=(X+Y)/2 ANS.

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