Step-by-step explanation:
We have been given that David, Egil and Frances share money in the ratio 2:7:9. 
Let 2x, 7x and 9x be the amounts of money that David, Agil and Frances get respectively.  
We are told that Frances gets $80 more than David. So we can write this information in an equation as:

Now let us solve for x. 


 
 
Now let us substitute  in 7x (amount of money that Egil gets).
 in 7x (amount of money that Egil gets).

Upon cancelling out 7 from numerator and denominator we will get,
 
  
Therefore, Egil will get $80.    
 
        
             
        
        
        
Answer:
2.25 inches
Step-by-step explanation:
The mean, or the average, or the rainfall amounts, can be found by adding all of the amounts together and dividing by the number of amounts. In this case,  . Hope this helps!
. Hope this helps!
 
        
                    
             
        
        
        
I think it's called a coordinate plane 
Sorry if I'm wrong