Let x be the age of ishaan so the age of ben will be 12+x. the equation will become x=x+12 
Going 3 years back, the age of ishaan was x-3 so that of ben would be x+12-3 before 3 years. at that time the age of ben was 4 times the age of ishaan. it means x+12-3(the age of ben)=4(x-3(the age of ishaan))
solving this equation, we get the answer x=7. this is the age of ishaan in the present.
        
                    
             
        
        
        
Step-by-step explanation:
A straight line adds up to 180°
m+3m=180°
4m=180°
m=45°
3m=45°
angle CBD=3(45)
=135°
 
        
                    
             
        
        
        
1/8=0.125
0.625*5=0.625
Or
1/2=0.5
0.5/2=1.25
1.25/2=0.125
Which is 1/8
        
             
        
        
        
Answer:
A and B
Step-by-step explanation:
1/4x^2 = (1/2x)^2