The sixth term is 22 and the common difference is 6. what is the fifteenth term?

Find the solution of each of the following.

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.

How can (square root of 25) ^2 be rewritten?