What is 7:9 in simplist form

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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?

Jim had 15 minutes to do 5 laps around his school what would his time be