Wednesday
July 30, 2014

Homework Help: Math

Posted by Jon on Wednesday, April 22, 2009 at 3:22pm.

Write the standard form of the equation of the circle that passes through (0,4) and has its center at (-3,-1).

(x-h)^2 + (y-k)^2 = r^2
(x+3)^2 + (y+1)^2 = r^2
r^2 = d
d = sqrt(x2-x1)^2 +(y2-y1)^2
d = sqrt(-3-0)^2 + (-1-4)^2
d = 3^2 + -5^2
d = sqrt34

(x+3)^2 + (y+1)^2 = r^2
(x+3)^2 + (y+1)^2 = sqrt34 <--(answer)

I got half off, she just circled the sqrt34 part

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