Subtract and simplify: 4y/y^2-10y+21-1/y-3

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the plzzz write a proportion i will give you 100 points