Two circles are concentric if they have the same center. Which equation represents a circle that is concentric with
the circle shown but has a radius that is twice as large?

A (X - 4)^2 + (-6)^2 = 4
B (X - 4)^2 + (-6)^2 = 16
C (x - 6)^2 + (-4)^2 = 16
D (X - 6)^2 + (y - 4)^2 = 4

graph them on a graphing calculator, press 2nd trace. select intersect. hit enter until it says answer. ti 84 works best

step-by-step explanation:

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

ya