Using this RPI predictor again - if Nebraska wins their next 2, their RPI should jump from 60th to 50th.
If they then lose to Michigan, it will be 57th.
If they beat Michigan and then lose to Michigan State, it will be 46th.
If they beat Michigan, beat Michigan State, then lose to Purdue, it will be 37th.
If they beat Michigan, beat Michigan State, then lose to Ohio State, it will be 39th.
Of course these are estimates based on current RPI, but they will be close.
This basically shows what many have been thinking - win the next three, including Michigan in the Big Ten tourney, and they should be okay (provided the loss in the Big Ten tourney comes to Michigan State, Purdue, or Ohio State) - if they happen to win 2 games in the Big Ten tourney, I don't see how they get left out.