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# 46 please show your work
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Jan 19, 2018
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# 46 please show your work
Mathematics
middle-school
Andreasbovens
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Replace every n with 15 to get 15*(15-1)/2 = 15*14/2 = 15*7 = 105
Answer is choice C
Lakeia
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Jan 24, 2018
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Lakeia
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