Graphing points for equations f (x)=1/2 (x)+8

What signals you that factoring by grouping is the best method to use when factoring a problem?

1. are the triangles similar and if so why? what is the value of x? show your work.

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.