What is the equation of the image of circle S after a dilation with a scale factor of 3 centered at (-2,1)?

What term makes it inconsistent y=2x - 4

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?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?