Seeley is using a cart to move several large boxes at a time. if each box weighs 18 lb and the cart weighs 12 lb, how much total weight must he move if he loads 5 boxes onto the cart?

So how much weight does he have to move? Well we need to find what 5 boxes weighs and add that to the weight of the cart itself to get the total weight he will be moving. So if 1 box weighs 18 lb, then you multiply 18 by 5 because each box is the same weight. So 18 times 5 = 90. So he will move 90 lb plus the weight of the cart, which is 12 lb. so now to get the total amount of weight he will have to move, we add 12 lb to 90 lb. 90+12= 102, so he will move in total 102 lb. hope this helps

The first one is correct