Final answer:
To determine how much more the truck could haul, subtract the current load from the maximum capacity of the truck.
Step-by-step explanation:
To determine how much more the truck could haul, we need to subtract the current load of 7.4 tons from the maximum capacity of 9 tons. This can be represented by the equation:
9 - 7.4 = 1.6
Therefore, the truck could haul 1.6 tons more.