Question

Find the diameter of the circle (x - 4)2 + (y + 6)2 = 16.
A) 2
B) 4
Eliminate
C) 8
D) 16

Answer 1

\[\huge\rm (x-h)^2+(y-k)^2=r^2\] circle equation
where (h,k) is the center
and r is radius

Answer 2

we know that
\[\huge\rm d= r \cdot 2\]
d=diameter

Answer 3

ok

Answer 4

so what's the radius ?

Answer 5

i dont know what to do to be honest

Answer 6

\[ (x - 4)^2 + (y + 6)^2 = 16\] compare this equation with the general equation of a circle

Answer 7

what number is replaced by r^2 ?

Answer 8

i figure it out. is it b?

Answer 9

how did you get b?

Answer 10

read my 2nd comment
diameter = radius times 2

Answer 11

no c