Justin takes the bus home from school. He gets off the bus, walks a short distance to his friend's house, and stops to talk. Then he walks to his house. Sketch a graph for this story that compares distance from home to time. Explain your graph.

If 90° < θ < 180° and cotθ = -1/3, then cscθ =

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.

Find the solution of this system of equation -7x+y=-20 9x-3y=36