###Human: Kat gets a 95% on her first math test and an 80% on her second math test. If she wants an average grade of at least 90% in her math class, what does she need to get on her third final math test?, ### Assistant: Let x = the percent needed on her third math test
(95 + 80 + x)/3 = 90
(95 + 80 + x) = 270
x = 270 - 95 - 80
x = 95 
 So the answer is :  95