First off, we'll convert the mixed fractions to "improper",

 
 
        
        
        
Answer:
216cm
Step-by-step explanation:
i think that's right
 
        
                    
             
        
        
        
Answer:
B: 6x+2
Step-by-step explanation:
hope this helps :)
 
        
             
        
        
        
Distributive Property:  a ( b + c) = (a*b) + (a*c)
b)   x(x + 9) =  x*x + 9*x 
                = x² + 9x    
c)  x² - 18x 
      x² = x * x
   18x  = 18 *x
 G C F = x
Greatest common factor in both the terms is 'x'.Take the common variable from both the terms.
x² - 18x = x*x - 18*x
             = x (x - 18)
             
Standard form.                Factored form
       x²                                     x*x
 x²  +  9x                             x(x +9)
     x² - 18x                           x(x - 18)  
-x² + 10x                             x(-x + 10) = x(10 -x)
-x² - 2.75x                          -x(x + 2.75)
 
        
             
        
        
        
Answer:
x=-5, y=-8. (-5, -8).
Step-by-step explanation:
-x+2y=-11
5x-8y=39
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5(-x+2y)=5(-11)
5x-8y=39
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-5x+10y=-55
5x-8y=39
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2y=-16
y=-16/2
y=-8
-x+2(-8)=-11
-x-16=-11
-x=-11+16
-x=5
x=-5