Find the mean, median, and mode of the following set. 27, 20, 34, 37, 21, 42, 39

Can someone me and do the problem plz so i can understand it more better

Add the fractions and simplify 1/2+ 1/3

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.