Shana and Bill are working together to solve the system by substitution. Shana wants to rewrite the first equation to solve for x. Bill wants to rewrite the second to solve for y. Who is correct? Why? (Answer choices in picture)

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

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.

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position