Which expression is equivalent to 2(12x - 18), 3(8x - 12), and 4(6x - 9)

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

What statement is true? 2x^2-9x+2=-1

Use sigma notation to represent the following series for 9 terms.