Geometry will give brainliest answer. the equation of a circle is x^2 + y^2 - 12y + 20 = 0 what are the coordinates of the center and the length of the radius of the circle

This looks like:

(x - h)2 + (y - k)2 = r2

You should be able to pull the correct center coordinates and radius from there.

what is the original number? you forgot to add it.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this