Final answer:
When z=-1, the expression (-z+7)/(z-5) simplifies to -4/3.
Step-by-step explanation:
To evaluate the expression for z=-1, substitute z=-1 into the given expression:
(-z+7)/(z-5)
= (-(-1)+7)/(-1-5)
= (1+7)/(-6)
= 8/(-6)
So, the expression simplifies to -4/3 in simplest form.
Learn more about Evaluating expressions