Simplify the following expression.
-14x^2+9x-4x^2+5

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.

For the equations below which statement is true ? -2x=14 6x=-42

When you answer this can you explain