Answer :
Answer:
A. 5xy + 9yz + 3zx + 5x – 4y
Step-by-step explanation:
uhh credit for this answer goes to Blaise Pascal for inventing calculators .-.
Hewo.
Answer below.
----Steps----
Add the expressions.
5xy+3xz+9yz+5x−4y
Brainliest, if it helps.