Please answer thank you It’s a graph so please show work on a graph

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. !

Evaluate 4 a for a = 5 2/3 . express your answer in simplest form.

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.