Factor completely. m ^4 - n ^4
(m^2 - n^2)(m + n)(m - n)
(m^2 + n^2)(m + n)(m - n)
(m^2 + n^2)(m - n)^2

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

Which of the points a(6, 2), b(0, 0), c(3, 2), d(−12, 8), e(−12, −8) belong to the graph of direct variation y= 2/3 x?

Which system of linear inequalities is represented by the graph?