Select the number line that shows that two opposite numbers have a sum of 0.
A
1-8-7-6-5-4-3-2-1 0 1 2 3 4 5 6 7 8
6
-
-8-7-6-5-4 3-2-1 0 1 2 3 4 5 6 7 8
O c.
-% -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8
5
D.
8 -7 -6 -5 4 -3 -2 -1 0 1 2 3 4 5 6 7 8

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

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 are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2