Question

If the equation of a circle is (x + 5)^2 + (y - 7)^2 = 36, its radius is:

A. 6
B. 16
C. 36

Answer 1

compare your equation with the general form
(x - a)^2 + (y - b)^2 = r^2

where the center has coordinates (a,b) and r = radius

Answer 2

line them up and you'll see what the radius is

Answer 3

the radius is 6 then correct?

Answer 4

yes
6^2 = r^2 = 36

Answer 5

thank you :)

Answer 6

yw