Factor the expression completely over the complex numbers. x4−81

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

Write the pair of fractions as a pair of fractions with a common denominator

Which of the following is an equation of a line parallel to the equation y=4x+1?