Answer:
a, b, c, & d
Step-by-step explanation:
 
        
             
        
        
        
Answer is squareroot of 21 or 4.58 in decimal
by pythagorean theorem
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First write the equation:
1/2x + 5 = 6
Then subtract five from both sides:
1/2x = 1
Multiply both sides by 2:
x = 2