H-h(1/4+1/3)
This is a reasonable equation because we are subtracting the amount of time max has used up so far from the total amount of time he has.
We are using the distributive property to represent the amount of time he has used up so far. This makes sense because 1/4 of his total time is equal to h*1/4. This is the same with 1/3.
Thus, we can use the distributive property to accurately describe it.
Hope this helps!