Author 
Topic 

lynna
New Member
USA
2 Posts 
Posted  10/16/2007 : 18:56:55

Please help me fine and equation for the left half of the circle given by (x+2)+y=9
I foiled the x+2 and solved for x. the answer I got was x= y4x5 but I didn't know if it was ok to still have the x in the answer. 


skeeter
Advanced Member
USA
5634 Posts 
Posted  10/16/2007 : 19:28:50

(x + 2) + y = 9
(x + 2) = 9  y
x + 2 = (9  y)
x = [2 + (9  y)]



sahsjing
Advanced Member
USA
2399 Posts 
Posted  10/17/2007 : 16:48:27

This is the same as you switch x and y, and then find the lower half of the circle. 


skeeter
Advanced Member
USA
5634 Posts 
Posted  10/18/2007 : 08:13:36

quote: Originally posted by David
Skeeter, isn't that just a translation of the entire circle to the left? If she wants the left half, should there not be boundaries defined?
{(x2) + y^=9; 5<=x<=2}
plot some points using my last equation and see the result for yourself. 



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