Answer:
36
Step-by-step explanation:
Yes.
Yes this is a linear equation.
First we need to simplify the equation down. We can do this by working through all the indicated subtractions shown in this equation.
3x - 2x - 9x = -8x
f(x) = -8x + 9
This is a linear equation. Check your work on a graphing calculator.
5
I think the third one should be true. But you can go with what you have.