Answer:
D 
Step-by-step explanation:
4 people = 15 days
1 people = 15/4 = 3.75
so, 6 people = 3.75 × 6
 = 22.5
 
        
             
        
        
        
Answer:It would be -4 across and go two up
Step-by-step explanation:
 
        
                    
             
        
        
        
35 = 45 - n
think of it as money
45 dollars take away how many (n) = 35 dollars
45 - n =35
or you can subtract 45 from both sides
-n = 35-45
-n = -10 
divide by -1 from both sides 
n = 10
        
             
        
        
        
Answer:
(-4, -3)
Step-by-step explanation:
The graph of both lines will be shown below.
To find the solution, we need to find the point on the graph that both lines intersect on. 
As we can see, both lines intersect on the point (-4, -3). Thus, that is the solution.
Best of Luck!