Answer:
plants getting there food is the basic use of photosynthesis
Step-by-step explanation:
 
        
             
        
        
        
450/30
15
15/3x =5
x= 5 
5+2y= 315
5-5+2y =315-5
2y = 310
2y/2 = 310/2
y=155
Step-by-step explanation:
450/45 
10 
2x+4y=450
2×5=10
10+(4×155)
=620/155
=4
10/5=2
 
        
             
        
        
        
Its b, no matter what, he has to pay 18 dollars which effects the y intercept
        
                    
             
        
        
        
Answer:
2.5 grams I think or 0.25
Step-by-step explanation: