It’s d
You just have to keep on substitutes x or y . I added a picture hope that helps
Need more information to answer the question
Answer:
Step-by-step explanation:
1. Do what is inside the parantheses


2. Simplify both terms

3. Solve

The answer would be 6.412 × 10^4
Answer:
the practice of analyzing and describing a complex phenomenon in terms of phenomena that are held to represent a simpler or more fundamental level, especially when this is said to provide a sufficient explanation.
Step-by-step explanation:
from dictionary . com or smth