Answer:
4
Step-by-step explanation:
Hi there! I'm glad I was able to help you!
When I was in school and I learned about this, my math teacher taught us that in order to find the degree of a polynomial you would determine which variable or number had the largest exponent.
In our case, 5z^3 - 2z^4 - 9z^2 + z would have a degree of 4, because the variable z in 2z^4 has an exponent of four.
The 4 in the polynomial is the largest exponent, therefore the degree of the polynomial we are given is four.
I hope this helped you! Comment below if I can help you with anything else! :)
