If you flip a coin three times, what is the probability that the coin will show the same side all three times?

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.

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

The image of abc after a reflection across eg is abc