yes
no
Answer:
Yes. A propotion is to check if two things are equivelent. The ratios 4:18 and 2:9 are equivelent.
Answer: The co-ordinates of the center are (-7, -1) and length of the radius is 6 units.
Step-by-step explanation: The given equation of a circle is as follows :
We are to find the co-ordinates of the center and the length of the radius of the circle.
We know that
the standard equation of a circle with center at the point (h, k) and radius r units is given by
From equation (i), we have
Comparing with the standard equation, we get
the co-ordinates of the center, (h, k) = (-7, -1)
and
length of the radius, r = 6 units.
Thus, the co-ordinates of the center are (-7, -1) and length of the radius is 6 units.