Hello from MrBillDoesMath!
Answer:  b
Discussion:
7b + 3 - 4b = 3 - 3(b+4)  =>
7b + 3 - 4b = 3 - 3b -12 =>
(7b - 4b) + 3   = -3b - 9 =>
3b + 3 = -3b -9    =>      Add 9 to both sides
3b + 12 = -3b -9 + 9  =>
3b + 12 = -3b  =>         ( add 3b to both sides)
6b + 12 = 0 =>             (subtract 12 from both sides)
6b = -12 =>
b = -12/6 = -2
Thank you,
MrB
 
        
             
        
        
        
Answer:
$9.68 more an hour
Step-by-step explanation:
 
        
                    
             
        
        
        
Let x tickets sold be adults, then (1024-x) were of childrens tickets, 9x+(1024-x)4 = 7680. The above equation is for total money solve it you will get x=720 hence, number of adult tickets were 720 and number of child tickets were 300 :)
        
                    
             
        
        
        
Answer:
i think a
Step-by-step explanation:
 
        
                    
             
        
        
        
It was would numbers 000-000-0000 through 999-999-9999. So that would be 9,999,999,999 + 1 = 10 billion different 10-digit phone numbers.