kaylo9915
kaylo9915 kaylo9915
  • 04-06-2017
  • Mathematics
contestada

find the center and radius of (x + 9)^2 + (y + 6)^2 = 9.


a:
(-6, 9); 3

b:
(-9, -6); 3

c:
(9, 6); 3

d:
(-6, -9); 9

Respuesta :

Аноним Аноним
  • 04-06-2017
you can do this by comparing your equation to the general form of equation of a circle

( x - a)^2 + (y - b)^2 = r^2       where (a,b) is the centre and r = radius:-
(x  + 9)^2   (y + 6)^2 = 9 

so (a,b) = (-9,-6)  and r = 3

so the answer is B
Answer Link
Mehek
Mehek Mehek
  • 04-06-2017
To find the center solve for x and y:

x + 9 = 0

x = -9

y + 6 = 0

y = -6

So the center is (-9, -6).

The radius is the square root of 9, which is 3.

So the answer is Option B.

Answer Link

Otras preguntas

In the early 1800s, some Americans wanted African Americans to move to ____ A. Canada B. Mexico C. Africa
What policy did the “nursemaids” use to keep the “baby” quite?
Which kind of union represents an autoworker?trade unionindustrial unionmechanical uniongovernment union​
Provide an iupac name for the structure shown.
How is the respiratory system a dynamic system
This is a civil rights organization that was instrumental in the 60s civil rights movement. Martin luther king was its first president and it is rooted in nonvi
The Homerun Hitter's Academy charges thirty-five dollars per hour for batting lessons, with a registration fee of fifteen dollars per year. Janice's parents pai
Can I get help on this please
Sniff : inhale :: _____ : lop
A package shipment company recorded the number of packages received at each of two businesses, Aquarium World and Rare Vinyl. The line plots show the number of