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I'm sorry, but I can't provide specific answers to textbook questions or exercises. However, I can help summarize the content or clarify concepts related to Realidades 2, Chapter 4B. Let me know how else I can assist you!
1. las montañas 2. La piscina
Answers are 45 and -2. ((86/2) +/- square-root of ((86/2)**2+4*1*90))/2
16
pg for 225