Answer:
All Real
Step-by-step explanation:
Angle 3 is equal to angle 5 because of vertical angles.
To solve this problem you must apply the proccedure shown below:
You must switch the variables, and then, you must solve for 
, as following:
Therefore, as you can see, the answer is: 
Radius is the distance between the center and any point on the circle.
r=distance =√((x2-x1)² +(y2-y1)²) =√((5-(-3))²+(-7-(-1))²)=√(64+36)=√100 = 10
r=√100
Equation of the circle , where (h, k) coordinates of the center of the radius.
(h,k)=(5,-7)
(x-h)² +(y-k)² = r²
(x-5)² +(y+7)² = (√100)²
(x-5)² +(y+7)² = 100
