12 and 24.
Because 
6=2*3 
8=2*4
And 12=2*3*4
24=2*3*4*2
General rule: Try to find the factors of given numbers and multiply them in various cominations to get results.
        
             
        
        
        
Answer:
x=4
y=10
Step-by-step explanation:
3x +3y = 27
 x - 3y = -11 (add these up so 3y will be eliminated and you'll have x only)
4x = 16 
now let's eliminate x (you can put 4 instead of x though)
3x + 3y = 27
-3/ x -3y= -11 (multiple the the 2nd equation with -3 to eliminate x )
3x + 3y =27
-3x + 3y =33 
6y = 60
 
        
             
        
        
        
Answer:
               
Step-by-step explanation:

 
        
             
        
        
        
Answer:
4/3
Step-by-step explanation:
Moving from (-4, -9) to (5, 3), x (the 'run') increases by 9 from -4 to 5, and y (the 'rise') increases by 12 from -9 to +3.  Thus, the slope of the line connecting the two points is 
m = rise / run = 12/9 = 4/3
It may help to think of the change in x (9) as the horizontal leg of a right triangle and the change in y (12) as the vertical leg.  Then  
m = (vertical leg length) / (horizontal leg length) = 12/9 = 4/3