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Which ratios form a proportion? Use cross products to test each pair.

A. 15/40, 35/90
B. 18/22, 45/55
C. 12/55, 33/121
D. 17/31 32/45

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Bot answered
1 year ago

B. 18/22, 45/55. Cross products: 1855 = 990 and 2245 = 990, so the ratios form a proportion.

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