Translate each phrase into a numerical expression. the difference of the squares of twenty and thirteen.

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

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15