Five terms of the sequence

Brent wants to know what is 5 x 1/2

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

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.