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Which angle of rotation is an angle of rotational symmetry for all figures?

The slope of the line below is -2 which of the following is the point slope form of the line

Atown recently dismissed 9 employees in order to meet their new budget reductions. the town had 7 employees over 50 years of age and 15 under 50. if the dismissed employees were selected at random, what is the probability that exactly 1 employee was over 50? express your answer as a fraction or a decimal number rounded to four decimal places.