What number divided by - 3 gives 12 as the result?

Which of the following is the formula for the sequence graphed below

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.