Let the maximum number of pages Jennifer can have be = x
Amount Jennifer has (P) = $62.10
Given equation is :
P = 
Price is given = 62.10 , so equation is :




Hence, Jennifer can have a maximum of 68 pages in her book.
I think 90 degrees but not 100 percent sure
ANSWER
D 5
EXPLANATION
The diagonals bisect each other so,
AE=CE
This implies that
3x+4+3x+4=38
6x+8=38
Group similar terms
6x=38-8
6x=30
x=5
Oder of operations is this;