Can someone with the first 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 tt of tokens james has is a function of gg, the number of games he plays

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?