Answer:
B
Step-by-step explanation:
x² + 9x
to complete the square
add ( half the coefficient of the x- term )² to x² + 9x
= x² + 2( )x + (
 )x + ( )²
 )²
= x² + 9x +  ← the value of c
 ← the value of c
= (x +  )² ← a perfect square
 )² ← a perfect square
 
        
                    
             
        
        
        
Hi friend 
3868000000 in scientific notation is : 3.868* 10^9 
I hope that's help:) Please rate 
If you have any further questions please let me know.Thx
 
        
                    
             
        
        
        
Step-by-step explanation:
4/5 + 2/3 = 2215 = 1 715 ≅ 1.4666667. Spelled result in words is twenty-two fifteenths (or one and seven fifteenths).
 
        
                    
             
        
        
        
Since the other angle that right next to it, the same angle you equal both angles together.
4x = 68.
We want to get x by its self. There is a 4 with the x and they're multiplying. to get rid of 4 we need to the opposite of multiplying which is division on both sides of the equation.
4x = 68
/4      /4
4 divided by 4 is 1 and 68 divided by 4 is 17
x = 17 is the answer.
If you plug in x = 17 into 4x, it will be 68