What expressions are equivalent to z + (z + 6)z+(z+6)

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

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs