Need the answers and explanation+work to go with it cause I need to understand it

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. !

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

What is a possible solutions of the x> 3?