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Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0.
For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree.
Find the distance between points at (–1, 6) and (5, –2).
Identify the conic section represented by x^2 – y^2 + 12y + 18x = 42.
Find the coordinates of the points of intersection of the graphs of x^2 + y^2 = 5, xy = –2, and y = –3x + 1.
Calculus please help ! -