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What is a reasonable solution?

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A jeweler must spend less than $300 to order gems for bracelets and necklaces. Supplies for each bracelet cost $5 and supplies for each necklace cost $12. This relationship is shown in the graph. The jeweler wants to make at least 10 more bracelets than necklaces. Which choice is a reasonable solution?
10 bracelets and 20 necklaces
10 bracelets and 30 necklaces
20 bracelets and 20 necklaces
20 bracelets and 10 necklaces




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1 Answer

  1. To solve the problem, we can set up the inequalities based on the information provided.

    1. Cost Constraint: Let ( b ) be the number of bracelets and ( n ) be the number of necklaces. The cost inequality can be set up as follows:

    [

    5b + 12n < 300

    ]

    2. Bracelet Constraint: The jeweler wants to make at least 10 more bracelets than necklaces:

    [

    b geq n + 10

    ]

    Now, let’s analyze the choices given:

    1. 10 bracelets and 20 necklaces:

    [

    5(10) + 12(20) = 50 + 240 = 290 < 300 quad text{(valid)}

    ]

    [

    10 geq 20 + 10 quad text{(invalid)}

    ]

    2. 10 bracelets and 30 necklaces:

    [

    5(10) + 12(30) = 50 + 360 = 410 < 300 quad text{(invalid)}

    ]

    3. 20 bracelets and 20 necklaces:

    [

    5(20) + 12(20) = 100 + 240 = 340 < 300 quad text{(invalid)}

    ]

    4. **20 bracelets and

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