The multiplication property of equality could be used to solve which of the following equations?

- 3 + y = 7
( x+2)( x-3)=0
m +7 = -12
b ÷ (-2) = 18

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. !

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

How do you determine if an ordered pair is a solution to a given equation?