2025年9月美国B卷 · 第 11 题

2025年9月美国B卷 · 原库模块 1 · Q11 原库参考解析

A freight elevator can hold a maximum weight of 4,840 pounds during one trip. A 170-pound person needs to deliver several boxes using the freight elevator. Some of these boxes weigh 21 pounds each and the others weigh 62 pounds each. Which inequality represents the possible combinations of the number of 21-pound boxes, x, and the number of 62-pound boxes, y , the person can deliver during one trip if only the person and the boxes are on the freight elevator?

2025年9月美国B卷 · 第 11 题

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