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School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.