Find the unit rate for the cost of each energy drink if 5 energy drinks cost $15 $3 per energy drink
$5 per energy drink
$5.50 per energy drink
$75 per energy drink

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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