Nine years ago, a woman was three times as old as her son. In eight years from now, the sum of
their ages will be 78. How old are they today?

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.

What is always true about a positive integer raised to a negative odd power?

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /