-x+2y=9 and x+3y=16 alive for system of equations​

Does anyone know of a quizlet or something for edmentrum /plato algebra 1

Volume of cylinder with a radius of 8cm and height of 25 cm

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?