Answer:
Rico writes a letter and mails it, since he writes quickly.
Explanation:
Question:
(Although this really is not a question.
Rico writes a letter and mails it. He writes quickly.
Combine the sentences into one sentence.
Explanation:
Heya, I heard you need help! Well, let me explain for ya! c:
As since would be the most relevant conjunction to add to the sentence to make it one sentence, I would add a comma after it instead of a period. Then, I would put since he writes quickly after that. Then, the sentences would be combined.
Hope that helped! If you have anymore questions, just comment down and I will try my best to help you! Au revoir!
~ Sienna