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Mathematics 12 Online
OpenStudy (anonymous):

Given: X1=22 x2=14 x3=15 x4=26 x5=18 y1=9 y2=15 y3=21 y4=20 y5=10

OpenStudy (anonymous):

evaluate do i need to add xi and yi?

OpenStudy (anonymous):

\[\sum_{i=1}^{27}x_i y_i\]

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