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Ans

B,D,F

Step-by-step explanation:

Y=5-x^2

Y=3x^2+1

Y=x^3

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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step-by-step explanation: