问题已解决
老師 為什么這個(gè)最后的結(jié)果7000不算了?為什么 5000 可以算,7000 就不算呢?中級(jí)考試問(wèn)題 ,急
FAILED
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同學(xué),你好
7000也可以算
固定修理費(fèi)=7000-20*200=3000
答案=3000? 20*180=6600
2023 08/10 20:58
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2023 08/10 21:00
什么意思?沒(méi)有明白
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2023 08/10 21:03
老師用的5000算固定修理費(fèi)a,7000也可以算a,只能選5000或者7000,不能把7000混在5000里面計(jì)算。
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2023 08/10 21:14
也就是5000和7000隨便哪一個(gè)都可以是吧 不用都算的對(duì)吧
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2023 08/10 21:14
老師 您能告訴我原理嗎 授人以魚(yú)不如授人以漁[呲牙]
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2023 08/10 21:21
是的,5000和7000任選一個(gè)就可以
原理是混合成本公式為
y=a? bx
其中a為固定成本,b為單位變動(dòng)成本
5000=a? b*100
7000=a? b*200
求解方程組
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2023 08/10 21:22
b求出來(lái)是20,代入第一式和第二式都可以求a
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2023 08/10 21:25
就是一式減二式對(duì)吧
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2023 08/10 21:48
對(duì),用數(shù)學(xué)知識(shí)解方程
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