Evaluate the expression when a = -7 and y =7 -a+9y

Each equation given below describes a parabola. which statement best compares their graphs? x = 2y^2 x = 8y^2

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32

What is the sum of the first 8 terms of the geometric series