Using the data from sections 2.15,2.16, & 2.19 show that these statements are true. (photos of 2.15,2.16, & 2.19 below) a) Σ(x+y) = Σx + Σy b) Σxy ≠ ΣxΣy c) Σcx = cΣx d) Σx2 ≠ (Σx)2

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