Help me I don't get it ..........................................

Answer:
130/231
Step-by-step explanation:
you just plug in the values of x, y, and z so:
[tex]\frac{-\frac{2}{3}*\frac{5}{7} }{-\frac{11}{13} }[/tex]
start by simplifying the top:
[tex]\frac{-\frac{10}{21}}{-\frac{11}{13} }[/tex]
divide:
[tex]-\frac{10}{21}[/tex]÷[tex]-\frac{11}{13}[/tex]
= [tex]-\frac{10}{21} * -\frac{13}{11}[/tex]
= [tex]\frac{130}{231}[/tex]