PQ = x - 5, QR = 2x -1, and PR = 21. Find X

Factor the expression using gcf 9b+45

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.