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8 December, 18:30

At a fish market, a pound of salmon costs $12 and a pound of shrimp costs $18. Mrs. Donnelly wants to buy 2 1/3 pounds of salmon and 3 1/2 pounds of shrimp. If she has $93, can she buy the amounts of salmon and shrimp she wants? If yes, how much money will she have left over? If no, how much more does she need?

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  1. 8 December, 18:31
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    Yes and she would have $2 left over because all the food costs $91.

    Step-by-step explanation:

    We should set up an equation so that everything makes sense. A calculator would be wise for this problem, but I am going to lay it out anyhow.

    We should convert the mixed numbers to improper fractions to not be confused. 3 1/2 becomes 7/2 or 3.5 and 2 1/3 becomes 7/3.

    From your wording, we can assume that the money Mrs. Donnelly has is either greater than or equal to $93.

    Thus, we have 12 * (7/3) + 18 * (7/3) is equal to or greater than 93 (this is an inequality).

    The math shows that the food costed 91 and so she only has $2 left.
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