What number is represented

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Which of the following contains a variable?

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.