Answer:
a=-15
Step-by-step explanation:
 
        
                    
             
        
        
        
To find x, you divide both sides of the equation by 12.20. This would look like this: 
12.20x/12.20 =372.10/12.20 . Then, the answer you get is 30.5, so. X=30.5
        
                    
             
        
        
        
Answer:
528
Step-by-step explanation:
because each class has 22 students and there are 24 classes you multiply them
 
        
                    
             
        
        
        
56x² - 49x + 14 = 7(8x² - 7x +2)
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The greatest common factor of 56, 49, and 14 is 7.
        
             
        
        
        
So this is a BIDMAS question so first you do what’s in the brackets so you have (1-9x1-4) and you have to do the multiplication first out of that to get (1-9-4) which is -12 so then you have overall 36 / -12 + 1 + 2 so you have to do the division first so do 36/-12 to get -3 and you have -3 + 1 + 2 which is 0 so your answer is 0.