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Mathematics 12 Online
OpenStudy (anonymous):

Use cross products to see if each pair of ratios forms a proportion. Replace each box with = or ≠ 1). 7/5 = 15/20 or 7/5 ≠ 15/20 2). 6/8 = 15/20 or 6/8 ≠ = 15/20

OpenStudy (anonymous):

cross multiply and check whether LHS is equal to RHS or not

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