What is the radius of the circle whose equation is given:

x² + y² + 10x + 9 = 0

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

Which graph represents the equation y =4x

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827