courtj17 courtj17

31-12-2016
Mathematics

contestada

Find the radius for a circle defined by (x - 1)2 + y2 = 81.

a. 9

b. -1

c. 81

d. 1

Respuesta :

31-12-2016

The radius is 9
The equation is
(x-h)^2 + (y-k)^2 = r^2

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