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24 July, 23:14

A drum and burgle corps rents instruments to members. Each burgle rents for $10 per month and each drums rents for $5 per month. Find the monthly income I if members rent 7 burgled and 9 drums. Then find the monthly income if members rent 9 burgled and 7 drums.

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  1. 24 July, 23:30
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    Case I

    $115

    Case II

    $125

    Step-by-step explanation:

    Bugles rent for $10 per month

    Drums rent for $5 per month

    Case I

    7 bugles and 9 drums

    7 * bugle cost per month + 9 * drum cost per month

    7 * 10 + 9 * 5

    70 + 45

    $115

    Case II

    9 bugles and 7 drums

    9 * bugle cost per month + 7 * drum cost per month

    9 * 10 + 7 * 5

    90 + 35

    $125
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