What is the value of x ? *EXTRA POINTS*

Issof claims that the scale factor is 1/2. which statement about his claim is correct

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.

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)