The radius is 9
The equation is
(x-h)^2 + (y-k)^2 = r^2
Answer:
a)
,
, b)
,
, c)
,
.
Step-by-step explanation:
The equation of the circle is:

After some algebraic and trigonometric handling:


Where:


Finally,


a)
,
.
b)
,
.
c)
, 
Where:


The solution is 
The parametric equations are:


B. 13
12^2 + 5^2 = c^2
169 = c^2
13 = c
please mark as brainliest :D
Answer:
y=-4x+9
Step-by-step explanation:
a line parallel to another line means the two lines have the same slope
so you can already cross out the second and last equation
the y-intercept is 9 so it is positive, not a negative 9
Answer:
7x/10
Step-by-step explanation: