If (x – 5) is a factor of f(x), which of the following must be true? a root of f(x) is x = –5. a root of f(x) is x = 5. both x = –5 and x = 5 are roots of f(x). neither x = –5 nor x = 5 is a root of f(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.