How many terms are in the expression 4b + 9 b?

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 zero function by factoring (try to show work) h(x)=-x^2-6x-9

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)