Without values for the other variables, I assume you're asking for a literal equation.
12y+d=-19y+t
31y+d=t
31y=-d+t
y=(-d+t)/31
        
                    
             
        
        
        
Answer:
one real solution 
Step-by-step explanation:
it has only one solution since it is a linear graph and only intercepts the x axis once
 
        
             
        
        
        
You can either scale down so you can get to 48 hours or just multiply from 20 to 48 and I'll explain both ways.
Scaling down:
You can find how many hours it takes to get to 1 gallon in the bucket by dividing
20÷5=4; It takes 4 hours to fill it up to one gallon.
You can now divide 48 by 4 to see how many gallons it'll take up to 48 hours.
48÷4=12
Quicker:
Divide 48 by 20;
48÷20=2.4
Now multiply since it filled it up to 5 gallons.
2.4×5=12
It'll fill 12 gallons in 48 hours.
Tell me if this helps!!
        
                    
             
        
        
        
The correct answer is c y-5=4(x-7)
        
             
        
        
        
Answer:
6 parts yellow 
Step-by-step explanation: