In the xy-plane, the parabola with equation y=x2+2 intersects the line x−y=−4 at two points. What is the sum of the x-coordinates of the two points of intersection? -1

1

2

5

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