Can someone me , its an easy question ; -;

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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=

What is the inverse of the function f(x) = 2x + 1?