Answer: 
Step-by-step explanation:
Given : Number of choices for novels = 4
Number of choices for plays = 6
Number of choices for poetry books = 5
Number of choices for nonfiction books = 5
Total books =4+6+5+5=20
If he wants to include all 4 novels, then the number of books left to select = 9-4=5
Remaining choices for books = 20-4=16
Number of combinations of n things taking r at a time : 
Then, the number of different reading schedules are possible :_

Hence, the required answer is
.
Answer: (r-1)(r^2+r+1)(2r^3+13)
Answer:
Lines 1 and 4 are parallel
Step-by-step explanation:
The image below shows the four lines graphed, and proves that lines 1 and 4 are parallel.
Hope this helps! :)
The answer is no shbajahwje