Lisa is taking a chemistry course in which three tests are given. Lisa received an 86 and a 72 on her first time exams. Lisa wants to get a grade of at least an 80% in chemistry write an inequality to determine the minimum grade that Lisa can get to receive at least an 80%.

10 points *honest* to the best answer. Thanks for the help!

I don't need know what the grade she needed. I need to know an inequality to determine it.