You can model the arch of a building entrance by using the equation y= −1/3(x+6)(x−6), where x and y are measured in feet. The x-axis represents the ground. Find the width of the arch at the ground.

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.