Answer:

Step-by-step explanation:
Let Kat reads k pages of the book.
Miguel reads 5 times as many pages of the book as Kat. So,
m = 5k ...(1)
Together they read 54 pages. i.e.
m+k = 54 ...(2)
From equation (1),

Hence, the equation that can be used to find how many pages Kat read is equal to 
.
 
        
             
        
        
        
5/23 is the correct answer
        
                    
             
        
        
        
Answer 
The answer is 36.
Explanation:
 Let the unknown number be x
x^3=x*36
or, x^3/x=36
or, x^2=36
or, x=6
.•. x=36
        
                    
             
        
        
        
I would think A because regular quadrilaterals have 90-degree angles.