When and ? How is it different?

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Which expression is equivalent to the expression shown?

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.