Which lines would be parallel, if any? line a: 2y = x + 12 line b: 2y - x = 5 line c: 2y + x = 4

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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b. 153 students do not participate in sports and seventy-five 12th graders were surveyed