What is the midpoint between (1,5) and (7,-3)

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. !

Which of the following are parts of a sphere

Find the value of x for which abcd must be a parallelogram -9-6x x-30