Answer:
4
Step-by-step explanation:
Yeah if you don't know this one... you're... special.
Answer: B. The coordinates of the center are (-3,4), and the length of the radius is 10 units.
Step-by-step explanation:
The equation of a circle in the center-radius form is:
(1)
Where are the coordinates of the center and is the radius.
Now, we are given the equation of this circle as follows:
(2)
And we have to write it in the format of equation (1). So, let's begin by applying common factor 2 in the left side of the equation:
(3)
Rearranging the equation:
(4)
(5)
Now we have to complete the square in both parenthesis, in order to have a perfect square trinomial in the form of :
<u>For the first parenthesis:</u>
We can rewrite this as:
Hence in this case and :
<u>For the second parenthesis:</u>
We can rewrite this as:
Hence in this case and :
Then, equation (5) is rewritten as follows:
(6)
<u>Note we are adding 9 and 16 in both sides of the equation in order to keep the equality.</u>
Rearranging:
(7)
At this point we have the circle equation in the center radius form
Hence:
Answer: 6 units
Step-by-step explanation:
You count the numbers between A and C
Do 72 divided by 7 to get your answer