Miguel has 400 minutes of pre-paid service on his phone each month. If he used the phone for 3 1/2 hours this months, how many pre-paid minutes of service remain?

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?