A discount airline sells a certain number of tickets, ,

for a flight for $90 each. It sells the number of

remaining tickets, y, for $250 each. For a particular

flight, the airline sold 120 tickets and collected a total

of $27,600 from the sale of those tickets. Which

system of equations represents this relationship

between x and y?

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?