Answer:
C=x (x+3)
Step-by-step explanation:
x cannot divide x+3 definitely so the denominators must be multiplied to get the least common denominator.
 
        
             
        
        
        
Answer:
-5
Step-by-step explanation:
Shown in the attachment.
The remainder when 3x^2 +5x -3 is divided by 3x+2 is -5
 
        
             
        
        
        
Correct question with correct options has been attached
Answer:
37
Step-by-step explanation:
Let C represent those dressed as heroes and let B represent those wearing mask
Thus;
n(C) = 39
n(D) = 45
We are told that 21 entrants were dressed as heroes wearing a mask. 
Thus; n(C n D) = 21
We are also told that there were a total of 100 entries. 
Thus, n(T) = 100
Now, number of entrants neither dressed as heroes nor wearing a mask is given by;
n(T) - n(C u D) 
n(C u D) = n(C) + n(D) - n(C n D) 
n(C u D) = 39 + 45 - 21
n(C u D) = 63
Thus;number of entrants neither dressed as heroes nor wearing a mask is: 100 - 63 = 37
 
        
             
        
        
        
Answer 28 because you plug it in for your answer.