They could look at the length of the book and the size of the font to estimate the length of a book.
Answer: 4 1/6
Step-by-step explanation:
9x-8=9x-3/2 X3
9x-8=27x-9/2
2(9x-2)=27x-9
18x-4 =27x-9
18x-27x=-9+4
-9x =-5
9x=5
X=5/9 answer
2.8a^2=55
a^2=55/2.8
a= square root of 55/2.8
x = 8/7
hope this helps on whatever you are doing!