Which of the following best describes the english expression the product of nine and a number minus five?
a. 9(x-5)
b. 9/x-5
c. 9x-5
d.9/x-5

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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