Question

11. Write an equation in standard form for the circle.

(x – 3)2 + (y + 5)2 = 64
(x + 3)2 + (y + 5)2 = 64
(x – 3)2 + (y – 5)2 = 64
(x + 3)2 + (y – 5)2 = 64

Answer 1

@campbell_st

Answer 2

just looking at it the diameter is 16 so the radius is 8

the centre is (3, 5) and r = 8

substitute it into the general form of the equation that was used in the previous question you asked.

Answer 3

u lost me. what do I mean exactly?

Answer 4

so (x-h)+(y-k)^2=r^2
(x-3)^2+(y-5)^2=8^29
(x-9)+(y-25)=64 <------ so this is my answer?
@campbell_st

Answer 5

nope... you don't square the x and y values that come from the centre... its only the radius that is squared.

Answer 6

(x – 3)^2 + (y – 5)^2 = 64

Answer 7

yep... thats better

Answer 8

thank u!