Whats the center and radius of (x+3)^2+(y-5)^2=64

Lindsay used two points, (x,y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

What makes a trapezoid an isosceles trapezoid?