What is 8b-ab+7a subtracted from 3a-9ab+b

What point is the projection of q on a) r b) s c) t

Joanie watched 1 out of three of a movie in the morning

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.