Evaluate the expression when X = 19 and Z = five

Question:
Solution:
Consider the following rational expression:
[tex]\frac{x+z^2}{x-3z}[/tex]if we evaluate this expression at x=19 and z=5, we get:
[tex]\frac{19+(5)^2}{(19)-3(5)}\text{ }[/tex]this is equivalent to:
[tex]\frac{19+25}{19-15}=\frac{44}{4}=11\text{ }[/tex]So that, we can conclude that the correct answer is:
[tex]11[/tex]