Variable c is 9 more than variable w. variable c is also 3 less than variable w. which pair of equations best models the relationship between c and w?

a. c = w − 9
c = 4w + 3
b. c = w + 9
c = w − 3
c. w = c + 9
w = c − 3
d. w = c − 9
w = 4c + 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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