on two tests so far this year a student received a 78 and a 93 the student want an average between 80 and 90 inclusive what are all of the possible scores for the third test so that the student falls within this average

I don't understand what you said steve

Tutors don't man this site 24 hrs.

We are all volunteers and come here at random times.
Clearly Steve is not online right now, but I gave an explanation to your question when you first posted it.
Look back at your earlier post