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Judy serves 30 roast beef, 40 ham, and 50 cheese sandwiches.

Enter the percent of the sandwiches served that were roast beef?

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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4+3x hope you like mark as brainliest✔

sorry but i cant draw that