Question

You have checked out b books from the library, where b is a number greater than 5. You plan to read three of the books and return them at the end of this week. In how many ways can you pick the books you will read first, second, and third?

A. b3 ways

B. (b3 - 3b2 + 2b) ways

C. (b3 - 9b2 + 27b - 27) ways

D. (5b - 3) ways

Answer 1

Number of ways is: bC3, a combination of 3 books from b books, where b > 5.

Answer 2

A

Answer 3

Suppose 3s represents an even integer. What polynomial represents the product of 3s, the even integer that comes just before 3s, and the even integer that comes just after 3s?

A. 27s3 + 12s

B. 27s3 - 3s

C. 27s3 - 12s

D. 3s3 - 12s

Answer 4

\[
(3s)(3s-2)(3s+2)
\]

Answer 5

C?