Rebecca is moving bags from a storeroom to a delivery truck. There are large bags that weigh 30 pounds each, and there are small bags that weigh 20 pounds each. Rebecca is using a cart to move the bags to the truck, and she can only move up to 360 pounds in one trip. x representing the number of large bags and y representing the number of small bags that can be moved with the cart in a single trip. Which solution is valid within the context of the situation? (8,5) (9,-3) (4.5,9) (-2,10)