2. Simplify the expression 2( x + 5.25) A. 2x + 5.25
B. 2x + 10.5
C. 12.5x
D. -2x + 5.25

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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