Coefficients are the numbers that are next to a variable(a letter in an expression). Therefore the coefficients would be 7 and 18 because they are both next to a variable (y and x).
I can’t exactly remember what a constant is but I think it is a number alone (not next to any variables) and they are ONLY separated by + and - not multiplication or division. In this case it would be all of the numbers that are in between the + or - (all of them.)
I also think a constant could be the variable next to the coefficient. Which would be y and x (next to 7 and 18).
I’m am so sorry I can’t remember what a constant is but I hope the coefficient helps:)
Answer:
the mean =19.5
Step-by-step explanation:
The equation of circle with the center at (h,k) is:

r stands for radius. Therefore r^2 = diameter or 2×radius.
The question has already given the information we need, which are:
- radius = 4
- the center at (0,8)
Since the center is (h,k) - therefore the center is at h = 0 and k = 8 making it (h,k) = (0,8).
Substitute the values in the equation:

Simplify to the simplest form

Answer
- The equation of a circle is x^2+(y-8)^2 = 16