Find the center and the radius of the circle

x^2-8x+2y=-y^2+19

On any given day, the number of users, u, that access a certain website can be represented by the inequality 1125-4530 which of the following represents the range of users that access the website each day? u> 95 or u < 155 95> u> 155 u< 95 or > 155 95

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)