Two planes, which are 4500 miles apart, fly toward each other. Their speeds differ by 50mph. If they pass each other in 5 hours, what is the speed of each?

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?

X+ y = 5 ; x - y =3 solve using linear combination

If you could answer these your a life saver