Given abc is similar to dfe solve x

What is the value of x in the diagram below?

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

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?