Answer:729
Step-by-step explanation:
81^3/2
(3^4)^3/2
3^6
729
Answer:
The fourth one.
Step-by-step explanation:
I am pretty sure.
Answer:
2xy+10z-5yz-4x
Step-by-step explanation:
Just put the positives and negatives together. You can't add or subtract any of them because they aren't like terms.