10. {(0,8), (1, 2), (3,7), (5,9), (3, 6)}

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Which of the following points is a solution to the system of equations shown? y - x = -1 x + y = -5