Let's assume 
number of birds with 2 wings is x
number of birds with 4 wings is y
A nature museum has 2008 specimens of early birds
so, 

Total of wings of 2 wings bird =2x
Total of wings of 4 wings bird =4y
The specimens have a total of 4384 wings
so, we get 

we can divide both sides by 2

so, we get system of equations as


we can solve for x and y 
We can subtract both equations 





so, 
number of birds with 2 wings is 1824
number of birds with 4 wings is 184.............Answer
 
        
             
        
        
        
X = 8 
because 8 x 2 = 16 
16 - 9 = 5
5 x 3 = 15
        
                    
             
        
        
        
120+120=240
The roof of the house is 240 ft^2
        
             
        
        
        
1) 300miles X $0.20 = $60 
2) $50 + $60 = $110
They spent $110 for the car.
        
             
        
        
        
Answer:
Step-by-step explanation:
Volume of the box  =  x³ +11x² + 20x – 32        I think the ' is a typo for ³
       the width is x-1    and the height is x+8       
 Find an expression for the length
        Vol = LWH    solve L
         Vol / (WH)   =  L     so
L  =  (x³ +11x² + 20x – 32) / (x-1) (x+8)      
                     so it would help to factor the numerator
        (x³ +11x² + 20x – 32)       I'm willing to bet (x-1) and  (x+8) are factors
                                                but I will plot the equation to find the three roots
         (x³ +11x² + 20x – 32)  = (x-1) (x+8) (x+4)
L  =  (x³ +11x² + 20x – 32) / (x-1) (x+8) 
    =  (x-1) (x+8) (x+4) / (x-1) (x+8)           the (x-1) and (x+8) cancel out leaving
L =   (x + 4)