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

Which of the following correctly applies to connotations? a. They are always fixed. b. They are always subjective. c. They can be fixed or subjective.
Why must every proposition in an argument be tested using a logical sequence? a. to keep debates and disagreements impersonal b. to discover if it makes logica
What is the MOST likely consequence of setting unrealistic goals?
Fenton is building a model of the living room. The model sofa is 16 inches long and 7 inches deep. The real sofas dimensions are 80 inches long and 35 inches de
Which best summarizes the events from the poem contained in these lines?
What was one method the nazi party used to communicate their message to the German people
How I do 5÷312 in long form of division
How many times can two go into 100
who was the first human on earth
Catching passes in flag football can help develop reaction time. Please select the best answer from the choices provided. T F