The point (x, y) lies on the circle with center (8,−4) and radius 9. Which equation must be true? A.
(x−8)2+(y+4)2−−−−−−−−−−−−−−−√=81
B.
(x+8)2+(y−4)2−−−−−−−−−−−−−−−√=81
C.
(x+8)2+(y−4)2−−−−−−−−−−−−−−−√=9
D.
(x−8)2+(y+4)2−−−−−−−−−−−−−−−√=9

c

step-by-step explanation:

when in doubt choose

hshsndjdbdjdjdbdjdxj jd did ddn did and djd f ddnddjd fnf sbabs. d d

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

add 8+12 to get a simplified answer of 12r-20