1) consistent system. at least one solution.
2) inconsistent system. no solutions (the lines are parallel)
3) dependent system. equations have same slope and y-intercept(same line)independent system. 
4) equations have different slopes(2 intersecting lines)
im not sure if thats what you were looking for
        
             
        
        
        
Your answer is C. because the paper is open like a kite or planes wings so it will float. With the crumpled paper it will fall instantly because its not open and has more mass
        
                    
             
        
        
        
First, add 29 on both sides.
42 - x is less than or equal to 0.
Next, add x on both sides.
42 is less than or equal to x.
Hence, the correct answer is (C).