Answer:
a. 3/5 liters per hour
b .06 hours
Step-by-step explanation:
Change 40 minutes to a fraction of an hour
40 minutes/ 60 minutes = 2/3 hour
 It takes 1 2/3 hours to fill the container
Changing to an improper fraction
(3*1+2)/3 = 5/3 hours
We want liters per hour
1 liter per 5/3 hours
1 ÷ 5/3
Copy dot flip
1 * 3/5 = 3/5 liters per hour
Change 100 ml to liters
We know 1000 ml  = 1 lt
100 ml * 1 lt/1000 ml = .1 lt
So 100 ml = .1 lts
.1 lt * 3/5 lt per hour
Changing the fraction to a decimal
.1 lt * .6 lt per hour
.06 hours
 
        
             
        
        
        
I'm pretty sure its line c.
Step-by-step explanation:
 
        
             
        
        
        
Different examples above! hope this helps c:
 
        
        
        
Y - x = 6
y + 2x = 57 
2y - 2x =12
y + 2x = 57 
∴3y = 69
   y = 23
 
23 - x = 6 
-x = -17 
x =17
large van = 23
small van = 17