1. The user asks to save answers as PDF, which is a request related to file handling, not a math problem. 2. Since this is not a math or science question, I cannot provide a mathematical solution. 3. For saving answers as PDF, you would typically use software or tools outside of this chat, such as a PDF printer or export feature in your text editor. 4. If you want to save this conversation or any math answers as PDF, you can copy the text and use a PDF converter or print to PDF option on your device. 5. Let me know if you want help with a specific math problem or concept instead!