Answer: r = 7
Step-by-step explanation:
Subtract 12 from both sides to isolate the r variable. You have -42 = -6r. Divide both sides by -6 to get r by itself and you get r = 7. Verify by substituting 7 as the r value and solving the equation. 
 
        
                    
             
        
        
        
Answer:
Its Number of Seats
Step-by-step explanation:
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
3(2+x)
distribute
=6+3x
 
        
                    
             
        
        
        
Area of rectangle = length x width
this is the formula to find it.
now , put the values of length and width,
=> area= 12 x 3 x 6 x 2 
=> area =  432 feet^2