What 2 consecutive numbers add to 257

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

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.

Fast! find the length of cu. the triangles are similar. show your work.