David23's latest activity

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    David23 đã đăng chủ đề mới.
    Carl's Jr. menu prices can differ from one restaurant to another because local operating costs, franchise pricing decisions, and current...
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    David23 đã đăng chủ đề mới.
    To check whether a proportion is true or false, compare the cross products of the two ratios. For example, print 4/6 = 10/15, multiply 4...
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