Which set of numbers may represent the lengths of the sides of a triangle?

A.
5, 7, 9
C.
8, 5, 3
B.
1, 3, 4

D.
4, 4, 9

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.