C- picture frames per box
        
             
        
        
        
53.96+0.17x =57.96+0.12x
0.17x-0.12x=57.96-53.96
0.05x=4.00
x=80 mi
        
             
        
        
        
Answer:
58.03
Step-by-step explanation:
What I did first to make it easier was make 5.5 to .055 and when you multiply those two together you get 3.025 which if you round it up becomes 3.03 and when you add 55 you get 58.03
 
        
             
        
        
        
Answer:  15
<u>Step-by-step explanation:</u>
small:     5     12      13
middle:  __   36     39
large:    45   108    117
Notice that to get from the small to the large, multiplied by 9
5(9) = 45    12(9) = 108    13(9) = 117
That is because the sides are proportional  
 
To get from small to middle, multiply by 3  
5(3) = 15     12(3) = 36    13(3) = 39
To solve it using proportions:
 