Can someone please help me with this homework?

Identify the number as a rational or irrational.explain. 127

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=

Which is f(5) for the function –2x2 + 2x - 3?