Please help I really need now

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. !

Find the domain and range of the following function f(x) = 51x - 21+ 4

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?