How do u find the mean? i've never done this before the subject is try check and revise

How do you multiply a mixed fraction by a regular fraction

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 function f(x)= -(x+5)(x+1) is down. what is the range of the function?