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The followingequation describes the Nike’s monthly demand for visits to the health club: Qd= 30 – 5P, where Qd is visits per month and P is dollar per visit.' t: r6 T _! w
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B.10
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/ D, \" \0 d1 l X C.651 M# \+ s( N* M y+ c# d
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答案和详解，登录后回复可见：
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发表于 2015-12-22 13:46:18
发表于 2019-3-31 12:23:51
