If the locus of the mid-point of the line segment from the point (3, 2) to a point on the circle x2 + y2 = 1 is a circle of radius r, then r is equal to:

The graph of the equation x + y = 7 will not pass through which quadrant?

The eccentricity of the hyperbola 36x2 - 64y2 = 1 is:

The equation of the directrix of the parabola y2 - 6y - 4x + 1 = 0 is: