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22 September, 11:39

Mckirnan Brothers went to introduce a special mixture of chocolate covered pretzels and chocolate covered peanuts the plan is to mix 12 lb of the mixture at a time to be sold for $3 a pound the price of stuff for $2.75 a pound of peanuts for $3.50 how many pounds of each should be in the mixture

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  1. 22 September, 11:52
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    There is surely a typo in there somewhere as reading it gave me a headache : D

    I believe it was intended to say that a pound of peanuts is $3.5 and a pound of covered peanuts is $2.75. Then we are to make a 12 pound mixture worth $3 a pound.

    Let p be the pounds of peanuts and c be the pound of chocolate covered peanuts. Then:

    (2.75p+3.5c) / 12=3, given that p+c=12, c=12-p, making the equation become:

    (2.75p+3.5 (12-p) / 12=3, multiply both sides by 12

    2.75p+42-3.5p=36 combine like terms on left side

    -0.75p+42=36 subtract 42 from both sides

    -0.75p=-6 divide both sides by - 0.75

    p=8 lb, since c=12-p

    c=4 lb

    So the brothers should mix 8 pounds of regular peanuts with 4 pounds of chocolate covered peanuts to produce a 12 pound mixture worth $3 per pound.
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