A local Chocolate Factory produces 3 varieties of Chocolate A, B & C. Ron bought a chocolate of each variety for a total of 21 pesos. Ericka bought for 8 chocolates of A variety, 3 chocolates of B and 4 chocolates of C for a total of 60 pesos. While Marie bought 9 chocolates of A variety, 2 chocolates of B and 1 chocolates of C for 70 pesos. Find the cost of each variety of chocolates using the diagonal, minors & cofactors, and pivotal method.

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A: Given: x=[-5,-4,-3,-2,-1,0,1,2,3,4,5], A= [0.45    0.61    0.75    0.88    0.96   1    0.96    0.88…

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A:

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A: