By the law of cosines, the angle 

 satisfies

which reduces to

which converts to approximately 77 degrees (this can be done my multiplying by 180 and dividing by pi).
 
        
        
        
Answer:
7x + 6 = 6x - 3
Step-by-step explanation:
2(x+3) + 5x = 3(2x-1)
Distribute
2x + 6 + 5x = 6x - 3
Combine like terms
7x + 6 = 6x - 3
hope this helps
 
        
             
        
        
        
Answer:
-1
Step-by-step explanation:
The midline is the average of the maximum and minum.
0.5 = (y + 2) / 2
1 = y + 2
y = -1
The minimum is at y=-1.
 
        
             
        
        
        
Answer:
52.4
Step-by-step explanation:
40 hundredths as a decimal is 40/100 which is .40.
The "fifty two" is a whole number which is in front of the ".40" which makes 52.4 or 52.40.