Solve the system of equations by the substitution method. X + 8y = 21
3x + 5y = 6

The solution is .(Simplify your answer. Type and ordered pair)

Arandom high school question but a hard one

What is the value of f(x) = 2.2 for f(-2)?

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.