What does А = лr 2 mean

(hurry! ) which expression is equivalent to the following complex fraction?

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

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.