Answer:
You can go for 1x9, 2x8, 3x7, 4x6, 5x5.
5x5 is the best as it builds a square, which maximizes space.
20*2.50 = $50. 
 
        
             
        
        
        
Answer:
x=1337/528
Step-by-step explanation:
-314x-214x=-1312-25
-528x=-1337
x=1337/528
 
        
                    
             
        
        
        
24/64= 3/8
so the ratio is 3 to 8 
        
                    
             
        
        
        
Answer:
x-int = (-40,0)
y-int = (0,15)
Step-by-step explanation:
:D
 
        
             
        
        
        
Answer:
41.67 kg
72 books
Step-by-step explanation:
mass of 150 books = 150/108 × 30 kg
= 41.67 kg
number of books = 20/30 × 108 books
= 72 books