Answer:  " 4x + 2xy - 7pq " .
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Explanation:
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Given:  " <span>4x - 7xy + 9xy - 7pq " ;  Simplify the expression;
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  Combine the "like terms:
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       -7xy + 9xy = 2xy ;
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Now, rerewrite the expression, substituting the "-7xy + 9xy";  with " + 2xy" ;
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   </span>→ " 4x + 2xy - 7pq " .
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For sum u add and for difference you subtract
        
             
        
        
        
These are the the letters that look the same when reflected across the line B,C,D,E,H,I,K,O,X
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
Median: 7.65
Mean: 7
Mode: 4.4
Range: 9.9
 
        
                    
             
        
        
        
An ordered pair of the inverse of f(x)D, (1.2)