Which pair of angles add up to 180 degrees?

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.

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

What is the measure of angle tvu shown in the diagram below