Your equation would be y= 6/7x+5 
Please mark brainliest
        
                    
             
        
        
        
You write it like 3 21/100
        
                    
             
        
        
        
Answer:
25 + 11 hope this helps 
Step-by-step explanation:
answer is the third one
 
        
             
        
        
        
Answer:
Race completed in 48 minutes.
Step-by-step explanation:
Let the speed of Max on hoverboard is = x 
Then as per question speed of Victoria on hoverboard = 3x
Now it has been given in the question that speed of Victoria on foot is 1/3 of the speed of Max on hoverboard that will be = x/3
Now we will form the equation.
As we know the formula speed = distance/time 
Let the time taken by both to complete the race be t minutes.
Distance covered by Victoria in 12 minutes + Distance covered by Victoria on foot = distance covered by Max on hoverboard
Then the equation will be 
12(3x)+(1/3)x(t-12)=xt






So 48 minutes it took to complete the race.
 
        
                    
             
        
        
        
Answer:
51.877 kg
Step-by-step explanation:
a
See attachment for calculations
b 
The amount of salt in the tank after 4 hours is gotten by simply replacing t in the equation from a, with 4 hours. Since the t gotten in a above is in minutes, we'd convert hours to minute as well. If we do that, we have
t = 4 hours = 4 * 60 minutes = 240 minutes 
y = 160/3 (1 - e^((-3 * 240)/200))
y = 160/3 (1 - e^(-720/200))
y = 160/3 (1 - 0.0273)
y = 160/3 (0.9727)
y = 51.877 kg
Therefore, the amount of salt in the tank after 4 hours is 51.877 kg