The mid point would be (1,25.5)
        
             
        
        
        
Found this when I was doing my own work, hope this helps.
 
        
        
        
Answer:
294 or 6
Step-by-step explanation:
if he has 7 bags and 42 marbles in each then the answer will be 294
but if ur tryna say that there are a total of 42 marbles combined, then there are 6 marbles in each bag
 
        
             
        
        
        
- The Midpoint of AB is (1,0).
 Given that:
- In line AB, where the coordinates of A is (3,1) and coordinates of B is (-1,-1).
 To find:
So, according the question 
We know that,
The midpoint M of a line segment AB with endpoints A (x₁, y₁) and B (x₂, y₂) has the coordinates M (  ).
 ). 
Now from question,
We know that the the coordinates of A is (3,1) and coordinates of B is (-1,-1) of line AB.
So, we can say that
    A is (3,1) or x₁ = 3 and y₁ = 1.
    B (-1,-1) or x₂ = -1 and y₂ = -1.
∵ The coordinates of midpoint M (X,Y)
           X = 
               = 
               = 2/2
           X = 1.
And 
           Y = 
               = 
               = 0/2
           Y = 0.
So, the midpoint of line AB is M (1,0)
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