Answer:50:18
Step-by-step explanation:
 I think that this is the answer because 50 yards can be ran in 18 seconds so for every 18 seconds you get 50 yards
 
        
             
        
        
        
Word form: Six over nine or two over three
Simpliest form: 2/3
        
             
        
        
        
Answer:
34a^2 + 21a - 20
Step-by-step explanation:
(12a^2 + 6a -8) - (-22a + 12 - 15a) 
12a^2 + 6a - 8 + 22a + 12 - 15a 
34^2 + 6a - 8 - 12 + 15a 
34^2 + 21a - 20 
 
        
             
        
        
        
Answer:
a) the varying densities are to be considered with respect to position
Step-by-step explanation:
the complete answer is found in the attachment
 
        
             
        
        
        
Answer: x = 24
Step-by-step explanation:
9x - 18 = 7x + 30
9x - 7x = 30 + 18
2x = 48
x = 48/2 = 24