Respuesta :

To get an average of at least a 70, Paul would have to get at least a 66 on his third test.
irspow
(60+81+s)/3≥70  multiply both sides by 3

60+81+s≥210  combine like terms on left side

141+s≥210  subtract 141 from both sides

s≥69

So Paul will have to score 69 or more on his next test in order to have an average of at least 70.