Do you understand how to solve or do you want me to explain
        
             
        
        
        
     <span> here 
 7 7/8 
 = [ (8*7) + 7 ] / 8 
 = (56 + 7) / 8 
 =63 / 8 
 similarly, 
 3 1/4 
 =[ (4*3) + 1] / 4 
 = (12 + 1) / 4 
 = 13/4 
 ---------------------------- 
 now put the values 
 7 7/8 - 3 1/4 
 = 63/8 - 13/4 
 here, take LCM of 8 & 4 which is 8. 
 now, 
 [ (1*63) - (2 * 13) ] / 8 
 = (63 - 26) / 8 
 = 37/8 
 = 4 5/8........................[ here, divide 37 by 8 which gives reminder as 5 and divisible value as 4 ]</span>
        
                    
             
        
        
        
Answer:
Sorry for the wait...here's the solutions! 
 
        
             
        
        
        
Three line segments can form a triangle if the length of the longest segment is greater than the sum of the lengths of the shorter segments.
 
They can form a triangle.
Now if c is the length of the longest side and a and b are the lengths of the shorter sides, then:
- if 

, the triangle is right
- if 

, the triangle is acute
- if 

, the triangle is obtuse

The triangle is obtuse.
The answer is D.