ILL GIVE BRAINLEST, please show work :D

Do not comment if you aren’t going to . create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

What is the vertex form of f(x) = x2 + 6x + 3

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs