Answer:
5.4
Step-by-step explanation:
The equations are equal so set them equal to each other and solve
 
        
             
        
        
        
6(100+90+8) is the equation
6x100 =600
  6x90 =540
    6x8  = 48
             1,188 is the answer                                      
        
                    
             
        
        
        
Answer:
The numbers are 39 and 14.
Step-by-step explanation:
Equation 1, sum of the numbers:
  
x  +  y   =  53
  
Equation 2, difference of the numbers:
  
x  -  y  = 25
  
System of equations:
  
x  +  y  =  53
x  -  y   =  25
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2x = 78
  
x = 39
  
Solve for y:
  
39  +  y  = 53
  
y  =  14
  
The numbers are 39 and 14.
 
        
             
        
        
        
<em>86.20 ft²</em>
- Step-by-step explanation:
 
<em>Hi there !</em>
<em>A = A₁ + A₂</em>
<em>A₁ =semicircle</em>
<em>A₁ = πr²/2</em>
<em>r = d/2 = 6.4ft/2 = 3.2 ft</em>
<em>A₁ = 3.14×(3.2ft)²/2 ≈ 32.15 ft²</em>
<em />
<em>A₂ =  trapezium</em>
<em>A₂ = (b + B)×h/2</em>
<em>A₂ = (5.1ft + 6.4ft)×9.4ft/2 = 54.05 ft²</em>
<em />
<em>A = 32.15 ft² + 54.05 ft² = 86.20 ft²</em>
<em>Good luck !</em>