Answer:
hope this helps
Step-by-step explanation:
x > −5
 
        
                    
             
        
        
        
Answer:
7.  7.8
Step-by-step explanation:
We can use Tan of this angle to find the missing side (in this case, the side adjacent to the angle measuring 57°)
  Tan A = (opposite side)/(adjacent side)
     Tan 57° = 12/x
solve for x
            x(Tan 57°) = 12
                x = 12/(Tan 57°)
                  x = 7.8   (rounded to the nearest tenth)
 
        
             
        
        
        
Y equals 240.3 ft. This is because the bottom angle of the triangle is an alternate interior angle to 31 degrees, so it is also 31 degrees. You can then create the equation tan31=y/400. To find y multiply each side by 400 and you’ll get 240.344