Hunter is 4.52 feet tall. his sister is 0.75 times his height. how tall is hunter's sister

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. !

Give me the equations of two lines that have the same slope but are not parallel.

We just started the introduction into circles and i have no idea how to do this.