The 2007 BMW 335i Coupe is offered with a choice of 14 exterior colors, 5 interior colors, and 4 trims. How many combinations involving color and trim are available for the model?

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Which one ? is the answer and how to find this answer

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20