Your answer is 3.8 I hope it helped :)
I think it’s c, because if the . next to the 12 means x then yes. There should be an c near 12 because we have no clue how much the notebooks are. If the . doesn’t mean x then it should be d.
How Much did the dinner cost? 12 divided by 3 = 4 So each person would pay 4$ for the tip.
