It says “The measure of an angle is 84º. find the measure of its supplement”plz help

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.

An angle that measures between 90 and 180° is called a(,

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)