Put the values of the variables in place of the variables in the expression, then do the arithmetic.

 
        
             
        
        
        
Answer:
3x^2-6x -3 
Step-by-step explanation:
(2x^2-5x+1)+(x^2-x-4)
we sum all coefficient according to the exponent of the variable
2x^2-5x+1+x^2-x-4 = 3x^2-6x -3 
 
        
             
        
        
        
Answer:
c
Step-by-step explanation:
3/4
 
        
             
        
        
        
Answer:
GET SCAMMMMMMED KIIDDDD!!!!!!!
Step-by-step explanation:
 
        
             
        
        
        
For some unknown reason, Brainly won't post my answer as it assumes the answer has inappropriate words or a link.
So, I added the answer in the attached image.
Kindly check it.