Solve for b.
12 =
18 + 6b

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Which expression shows the sum of the polynomials with like terms grouped together

How can you tell when x and y are not directly proportional?