The domain is the set of all first elements of ordered pairs (x-coordinates).
        
                    
             
        
        
        
-2y>12x-42
y<21-6x
so a is true
        
             
        
        
        
90 × 7 = 630 , it's not hard, it's easy
        
             
        
        
        
Answer:
57 miles
Step-by-step explanation:
342 divided by 5 equals 57 miles
 
        
             
        
        
        
12 dollars is discounted off, making the price 28 dollars.
Step-by-step explanation:
10 percent is 4$, 4×3=12