01:31:01 A store offers packing and mailing services to customers. The cost of shipping a box is a combination of a flat packing fee of $ 5 and an amount based on the weight in pounds of the box, $ 2.25 per pound. Which equation represents the shipping cost as a function of x, the weight in pounds? fx=2.25x+5 fx=5x+2.25 fx=2.25x-5 fx=5x-2.25
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