(X^2+5)!=250x!. find x

Ineed to know the answer to this algebra question.

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=

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?