Prove ABCD is a parallelogram by showing both pairs of opposite sides are parallel. please Show All Work! Thanks!!
       
      
                
     
    
    
    
    
    2 answers:
            
              
              
                
                
Answer:
Step-by-step explanation:
 To prove this we should first make a little representation to get an idea of how will proceed to work .
To solve it we should use vectors so the first step is to identify this vectors : 
- we have four points : A/B/C/D
- A(-2,-4)
- B(1,2)
- C(2,10)
- D(-1,4)
- VECTOR AB WITH VECTOR DC 
- VECTOR AD WITH VECTOR BC 
NOW LET'S IDENTIFY THEIR COORDINATES :
- VECTOR AB (1-(-2),2-(-4)) VECTOR DC (2-(-1),10-4)
- VECTOR AD (-1-(-2),4-(-4)) VECTOR BC (2-1,10-2)
We get :
- VECTOR AB (3,6) VECTOR DC (3,6)
- VECTOR AD (1,8) VECTOR BC  (1,8)
We notice that the opposite ones have the same coordinates so the edges are parallel .
If we want to check more we can calculate the lenghts : 
- AB= DC= DC=  
So AB=DC 
- AD= BC= BC=  
So AD=BC 
SO ABCD IS A PARALLELOGRAM
 
                                
             
                    
              
              
                
                
Answer:
Here You Go! I'm not really sure about this one but i tried. 
Step-by-step explanation:
 
                                
             
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I say it’s c it makes the most sense to me
        
                    
             
        
        
        
The answer would have to be d
        
                    
             
        
        
        
Answer:
2.7
Step-by-step explanation:
 
        
             
        
        
        
I believe your answer is 8.
Three times a number less than twice the number and nine is seventeen can be written as: 3n - 2n + 9 = 17
Solve for n as follows:
3n - 2n = n 
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17 - 9 = 8
Hope this helps! :)
        
             
        
        
        
Answer is x is less than 4