What is 5√28 + √63 in simplest radical form

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

An angle that measures between 90 and 180° is called a(,

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle