The answer is true, by definition, its true.
        
             
        
        
        
Step-by-step explanation:
1) 7x+3y=19
2)2x-7y=12
3) x=5, y=0
4) x=15/2, y=(-63/4)
5) x=9, y=92
6) x=(-2) , y=(-9)
7) x=5, y=(-2)
8) x=2, y=2
 
        
             
        
        
        
Answer:
The answer is 9 miles. 
Step-by-step explanation:
14-5=9.
 
        
                    
             
        
        
        
Answer:
The prime factors of 693 are 3, 7, 11.
Hope this helps!
 
        
             
        
        
        
12: 1.8= 20/3. =>  the answer is 20/3 miles