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ZX-0D914BA5212025年3月国际D卷练习 · 第 1 题
2025年3月国际D卷练习 · 原库模块 2 · Q1 原库参考解析
In one week in 2017, a technician earned a total of $900 by working at her regular job and at a second job doing part-time work. The equation \( 21h+10c=900 \) represents this situation, where h is the number of hours worked at her regular job and c is the number of hours worked at her second job. Which of the following is the best interpretation of 21 in this context?
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