Question

A circle has its center at (-2, 5) and a radius of 4 units. What is the equation of the circle?


answer choices:
(x + 2)2 + (y - 5)2 = 16

(x + 2)2+ (y + 5)2= 16

(x + 2)2+(y - 5)2 = 4

(x - 2)2+(y + 5)2 = 4

Answer 1

either a or b, i wanna say b

Answer 2

no you don't

Answer 3

is be supose to say (x-2)?

Answer 4

suppose*

Answer 5

a) was the right choice
\[(x-h)^2+(y-k)^2=r^2\] with \(h=-2, k=5, r=4\)

Answer 6

make the replacement and get
\[(x-(-2))^2+(y-5)^2=4^2\]
\[(x+2)^2+(y-5)^2=16\]

Answer 7

You can just look at it and see that it can't be b or d based on the signs of the constants in the parentheses. Looking at the other side of the equation, you can eliminate c as well.

Answer 8

Sorry its a! i meant to put a!