Final answer:
The truck travels at a rate of 55 miles per hour, so in 7 hours, it would cover 385 miles.
Step-by-step explanation:
To find out how many miles the truck travels in 7 hours, we need to first determine the truck's constant rate of speed. We know the truck travels 165 miles every 3 hours, which means to find out the rate per hour, we would divide 165 by 3. This gives us a rate of 55 miles per hour.
Next, we simply multiply the rate per hour by the total number of hours we are interested in, which is 7 hours in this case. So, the truck travels 55 miles/hour × 7 hours = 385 miles in 7 hours. This is the total distance the truck would cover at its constant rate.