Who can help me with my last question?

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

The measure of angle 0 is 600 degrees

The function y= x - 4x+ 5 approximates the height, y, of a bird, and its horizontal distance, x, as it flies from one fence post to another. all distances are in feet. complete the square to find and interpret the extreme value (vertex). select two answers: one extreme value and one interpretation.