N+14=17. n=3. So the missing number is 3.
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 = 
Answer:
69.53
Step-by-step explanation:
I did it on my calculator.
Yesterday = $3.60
Today = $3.10
% Decrease = ((3.60 - 3.10) / 3.60) * 100%
= (0.50/3.60) * 100%
≈ 0.1389* 100%
≈ 13.89 %
≈ 13.9 %<span> to the nearest tenth.</span>
Same side interior angles have a sum of 180 degrees
49 + x = 180 degrees
x = 180 - 49 = 131 degrees
Solution: 131 degrees