Find the mean (add all the numbers and divide the total by the number of data points) for the following set of numbers: -6, -4.5, 6, 9, 10.5 (right answer gets brainliest)

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

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.