Richard and Teo have a combined age of 33. Richard is 9 years older than twice Teo's age. How old are Richard and Teo

Ineed to know the answer right now! !

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?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!