Is this right? ? we are learning ‘applying systems of equations’

One positive number is 9 more than twice another. if their product is 95, find the numbers

Plot the intercepts to graph the equation

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.