Find the following probability for the standard normal random variable z. Please help!!!

Which expressions are equivalent to -6 + 3m

In the diagram below, abc is congruent to dec what is the value of x

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.