Answer:
Step-by-step explanation:
abc = 1
We have to prove that,

We take left hand side of the given equation and solve it,

Since, abc = 1, 
 and c =
 and c = 
By substituting these values in the expression,

                                        
                                        
                                        
Which equal to the right hand side of the equation.
Hence, 
 
        
             
        
        
        
Answer:
x=55
Step-by-step explanation:
The exterior angles of a polygon add to 360.
x+x+x+x+x+x+30 = 360
Combine like terms
6x+30 = 360
Subtract 30 from each side
6x+30-30 = 360-30
6x = 330
Divide by 6
6x/6 =330/6
x =55
 
        
             
        
        
        
Answer:
 x = 6 - √ 71
Step-by-step explanation:
 
        
                    
             
        
        
        
2x+4y=8
-2x       -2x 
4y=-2x+8
/4    /4   /4
y=-1/2x+2