Solve the system using row reduction on a calculator: 7x − 3y + 2z = 19 6x + 5z = 32 5x − 2y + 6z = 32 Answers: (4, 2, 1) (2, 4, 1) (2, 1, 4) (4, 1, 2)

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Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?