It should be 12.57 i remember having that question a few months back and i got it right
        
             
        
        
        
Answer:
7n+(3+2n)=30
Step-by-step explanation:
The number (n) is 3.
 
        
                    
             
        
        
        
Answer:
y = x - 9 + 3 +3
Step-by-step explanation:
In this case we can propose an equation where x is the starting point, and y is the ending point. Now, we know all the movements of the team, if we consider the yards won as positive values and the yards lost as negative values, the equation would be as follows:
y = x - 9 + 3 +3
If we solve we have:
y = x, that is to say, where they started.
 
        
             
        
        
        
It's obviously the second one
        
             
        
        
        
The angles are 72 degrees and 108 degrees.
Explanation:
Angle 1 : Angle 2 = 2 : 3
Angle 1 = 2k
Angle 2 = 3k
Angle 1 + Angle 2 = 180 (supplementary angles)
2k + 3k = 180
5k = 180
k = 36
Angle 1 = 2k = 2 x 36 = 72 degrees
Angle 2 = 3k = 3 x 36 = 108 degrees