What is the simplified expression for 18p + 9t + 2p - 7t?

For which rational expression is -2 an excluded value of x?

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.

Which system of linear inequalities is represented by the graph?