4/5 is the slope. When you isolate the y on one side of a linear equation, whatever number is with the x value is your slope.
        
                    
             
        
        
        
For the wooden box, if you do 7560 ÷ 180 you get 42. that's how many boxes you would need. multiply 42 by the cost of the wooden boxes: 42 × 0.70 you get 29.40 dollars
for the plastic container, do 7560 ÷ 126 which equals 60, the amount of plastic containers you would need. multiply 60 by the plastic containers cost: 60×40= 24 dollars. 
to save money, the company should use the plastic containers because it costs less than the wooden ones.
        
                    
             
        
        
        
Answer:
2x - 3..... 2*10 - 3 = 17
Step-by-step explanation:
Fog) = g(fx)) = f(x) - 4 => 2x - 3