Question

i need help with three questions.. help please?? no straight answers!

Answer 1

a circle has its center at (-3,2) and a radius of 5 units. what is the equation of the circle.

Answer 2

@cwrw238

Answer 3

ok the standard equation of circle is

(x -a)^2 + (y-b)^2 = r^2

where (a,b) is the centre and r = radius

Answer 4

okay, like. what is it really asking here? is the equation gonna be my answer?? or is it something else?

Answer 5

@iRespect

Answer 6

the equation is your answer
just plug in the values

Answer 7

so i put (-3,2) in there?

Answer 8

a = -3, b = 2 and r = 5

Answer 9

im sorry i just started doing this and im not good with math online :(

Answer 10

okay lemme do that

Answer 11

(x -3)^2 + (y-2)^2 = 5^2

Answer 12

so its this?

Answer 13

not quite - watch the double negative
its

(x - (-3))^2 + (y - 2)^2 = 25
= (x + 3)^2+ (y - 2)^2 = 25

Answer 14

so wait.. what is the bottom equation for??

Answer 15

the bottom equation is the final simplified equation
the first one substituted a with (-3)

- (-3) = + 3

Answer 16

oh!!!

Answer 17

okay so all that is a simplified? and would i have to use the second one in my answer as well??

Answer 18

the second one is the final answer

Answer 19

- I really shouldnt have written that first '=' on the last line - could be confusing

Answer 20

ignore it

Answer 21

thanks so much!! can i open another question?

Answer 22

i would help nut i've just got called away sorry

Answer 23

okay