Geometry
The answer is D because the two sides add up to 180.
Let number of books by astrid's = x
Out of x , 84% are fiction.
So, Number of non fictional books = x - 
= 
→Ratio of number of books to fictional books
⇒[Dividing numerator and denominator by 4.]
→Out of 25 books by astrid 21 are fictional.
→ Number of fictional books by astrid = 
The answer should be 1y and -6y
Answer:
x = 15
Step-by-step explanation:
Use pythagorean theorem: 
