The function f(x) satisfies f(y)f(x)​=yx​ for all positive real values of x and y, and f(2)=3.
What is f(16) equal to?

A straight line with direction cosines (0, 1, 0) is

If the centroid of a triangle formed by (7, x), (y, -6) and (9, 10)…

What is the acute angle between the pair of straight lines √2x + √3y –…

What is the equation of the straight line parallel to 2x + 3y + 1…

What is the equation of the ellipse having foci (±2, 0) and the eccentricity 1/2?