The answer is four. It's like asking to give the least common denominator
        
                    
             
        
        
        
ANSWER

EXPLANATION
Use the Pythagoras Theorem to obtain,

This implies that,


Take the positive square root of both sides to get,


 
        
                    
             
        
        
        
Answer:
D
Step-by-step explanation:
none of the others make sense
 
        
             
        
        
        
Answer:

Step-by-step explanation:
The picture of the question in the attached figure
we know that
The triangle ABD is an isosceles triangle
because
AB=BD
The segment BM is a perpendicular bisector segment AD
so
<em>In the right triangle ABM</em>
Applying the Pythagorean Theorem

we have

substitute 

 -----> equation A
 -----> equation A
<em>In the right triangle BMC</em>
Applying the Pythagorean Theorem

we have

substitute 

 
   

 ----> equation B
 ----> equation B
equate equation A and equation B

solve for x

Simplify

<em>Find the length of DC</em>

substitute the given values


 
        
             
        
        
        
Answer: 4.25
divide 4 on both sides, and it should leave you with x = 4.25
your welcome :)