Final answer:
The expression that represents the weight carried by x hikers is 10.2x lb. This means that for each hiker, the weight carried would be 10.2 lb, and if there are x hikers, we multiply that by x.
Step-by-step explanation:
To find the expression that represents the weight carried by x hikers, we need to add up the weights of all the items carried by each hiker. Based on the given information, each hiker carries a total weight of 4.6 lb + 3.4 lb + 2.2 lb = 10.2 lb. Therefore, the expression that represents the weight carried by x hikers is 10.2x lb. This means that for each hiker, the weight carried would be 10.2 lb, and if there are x hikers, we multiply that by x.