Answer:
The answer is D
Step-by-step explanation:

The length of RS is 10 because it's a 3-4-5 right triangle
Y=5x
hope this helps you if not plz let me know (:
have a good day
-denis
Step by Step :
1. 9(2j + 7 + 5j)
2. (9)(2j) + (9)(7) + (9)(5j)
3. 18j + 63 + 45j
Answer: 63j + 63