Would 2-3 have the same answer as 3-2? Why or why not?

Which is an equation for the nth terms of the sequence 12,15,18,21

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.

Which graph correctly represents the equation  y=−4x−3? guys me iam not trying to fail summer school and will offer 40 points for who ever me with the next 3 problems and will give brainlest