80% of what number is 15

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. !

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

Ten times the square of a non-zero number is eqaul to ninety times the number