Ineed these asap cause i’m on a time. who is right gets brainliest

Which expression shows the sum of the polynomials with like terms grouped together

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.

Factor the gcf out of the polynomial 9x^6+6x^4+15x^3