Linear models example 1 | Algebra I | Khan Academy

TL;DR

Naoya read a book at a rate of 55 pages per hour and had 330 pages left after reading for four hours.

Transcript

• [Voiceover] Naoya read a book cover to cover in a single session, at a rate of 55 pages per hour. 55 pages per hour. After reading for four hours, after reading for four hours, he had 330 pages left to read. How long is the book in pages and how long did it take Naoya to read the entire book? Well there's a bunch of ways that we could approach th... Read More

Key Insights

• 🫠 Naoya reads at a consistent rate of 55 pages per hour.
• 📟 The amount of pages left to read decreases by 55 pages every hour.
• 🫠 Naoya had 330 pages left after reading for four hours.
• 🪘 The book is 550 pages long.
• 🫠 Naoya took a total of ten hours to read the entire book.
• ❓ Linear equations can be used to represent Naoya's reading progress.
• 🥺 Different methods can be used to solve the problem, but they all lead to the same result.

Questions & Answers

Q: How many pages did Naoya have left to read after three hours?

After three hours, Naoya would have 385 pages left to read. (330 pages + 55 pages)

Q: What is Naoya's reading rate?

Naoya reads at a rate of 55 pages per hour.

Q: How long is the book in total?

The book is 550 pages long.

Q: How long did it take Naoya to read the entire book?

It took Naoya a total of ten hours to read the entire book.

Summary & Key Takeaways

• Naoya read a book at a rate of 55 pages per hour and had 330 pages left after four hours of reading.

• The book is 550 pages long, based on the initial number of pages left to read.

• It took Naoya a total of ten hours to read the entire book.