What are the domain and range?

Question and answers are in the attached picture. you so much in advance.

The transitive property of equality states that: o if a = b, then bra o if a = b, then ac = bc o if a = b and b= c, then a = if a = b and c= c, then a + b = b + c

Solve for n? [tex]z = \frac{3}{4} mn[/tex]