Answer:
 The standard deviation is 10.38
Step-by-step explanation:
Given;
Variance, v = 107.76
mean, x = 34.2
The standard deviation is given by;
standard deviation = √variance
standard deviation = √107.76
standard deviation =  10.381
standard deviation = 10.38 (two decimal places)
Therefore, the standard deviation is 10.38
 
        
             
        
        
        
Answer:
3.6
Step-by-step explanation:
d = sqrt(3^2+2^2) = sqrt(13) = 3.6
 
        
             
        
        
        
 
x=-6+2y
x=2+2y
by subtraction
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x=-8
Substitute x by one of the two equations :
x=-6+2y
-8=-6+2y
2y=-8+6
2y=-2
y=-2/2
y=-1
 
I think this is the answer 
I hope I helped you^_^
 
        
             
        
        
        
PEMDAS
multiply 2x2=4 and simplify the equation by looking for like terms to combine.
4+16x+y+34=0
4 and 34 are like terms so add them. 
the simplified expression is 16x+y+38