Unformatted text preview: x / ∈ I . It follows that I = S . 1.24. There is no missing dollar. Adding the tip to the amount the guests paid is erroneous. The charge for the room ($25) plus the tip ($2) coincide with the total amount paid by the guests (3 · $9=$27). 1...
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 Spring '10
 Math, absolute value function

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