Question

6.) Write the standard equation of the circle in the graph.

http://assets.openstudy.com/updates/attachments/5104aa91e4b03186c3f99082-lyssalauren-1359260342950-mc0141.jpg

my answer: (x-3)^2+(y+2)^2=9. Is that correct?

7.) A low-wattage radio station can be heard only within a certain distance from the station. On the graph below, the circular region represents that part of the city where the station can be heard, and the center of the circle represents the location of the station. Which equation represents the boundary for the region where the station can be heard?

Answer 1

http://assets.openstudy.com/updates/attachments/50cec822e4b0031882dc9f88-hannaalovee-1355728955021-image222.jpg

Answer 2

my answer: (x + 6)^2 + (y + 1)^2 = 16. is that correct?

Answer 3

@jenny1003

Answer 4

@kropot72

Answer 5

Give Me A Sec.

Answer 6

Alright.

Answer 7

: )

Answer 8

Can you show me how you got that ?

Answer 9

@Lollygirl217

Answer 10

the center is at (3,-2) and the radius is 3

general form of a circle is
(x - a)^2 + (y - b)^2 = r^2

(a,b) is the center and r = radius

Answer 11

your answer to the first question is correct

Answer 12

Thanks @welshfella

Answer 13

second is also correct