Parallel lines and tranvsveral

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

What is the upper quartile in the box plot?

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?