PSAT 8/9 P2 · 第 2 题

PSAT 8/9 P2 · 原库模块 1 · Q2 原库参考解析

To repair a refrigerator, a technician charges $60 per hour for labor plus $120 for parts. Which function $ f $ represents the total amount, in dollars, the technician will charge for this job if it takes x hours?

PSAT 8/9 P2 · 第 2 题

解题思路

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