Answer:
Angle <u>A</u><u> </u>= 15°
use angle properties of triangle to solve this.
 
        
                    
             
        
        
        
<span> He could draw a diagram of a rectangle with dimensions x – 1 and x – 6 and then show the area is equivalent to the sum of x2, –x, –6x, and 6.</span>
        
                    
             
        
        
        
Group first 2 and group last 2 and find factors and undistribute
(4x^3+x^2)+(-8x-2)
(x^2)(4x+1)+(-2)(4x+1)
x^2(4x+1)-2(4x+1)
answer is first one
        
                    
             
        
        
        
The population decreases by 4118 so the previous population was 18,318