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Nov 14, 2011 10:34 am
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Material A costs $3 per kilogram, and Material B costs $5 per kilogram
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Data Sufficiency (DS)
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If 5^x – 5^(x- 3) = 124*5^y, what is y in terms of x?
Feb 11, 2011
25
If an automobile averaged 22.5 miles per gallon of gasoline
Feb 11, 2011
5
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