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mariannu

  • 3 years ago

6 oz of Pranav's Premium Coffee Blend was made by combining 2 oz of Arabica coffee beans which cost $12/oz with 4 oz of robusta coffee beans which cost $9/oz. Find the cost per oz of the mixture. SHow me how to do this so I will know how to do the other problems.

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  1. mariannu
    • 3 years ago
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    I will gladly appreciate if you help. Thank you very much.

  2. timo86m
    • 3 years ago
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    $12 oz * 2= arabica $9 oz *4 = robusta arabica + robusta = pranav just plug in the w ($12 oz * 2)+($9 oz *4 )= pranav

  3. mariannu
    • 3 years ago
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    hmmm my teacher uses the box and then he plugs it in like that. XD Do you know how to use the rectangular box version?

  4. mariannu
    • 3 years ago
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    |dw:1363159124065:dw|

  5. mariannu
    • 3 years ago
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    He plugs in the numbers in there and then he puts it into that equation you wrote.

  6. mariannu
    • 3 years ago
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    |dw:1363159165717:dw|

  7. mariannu
    • 3 years ago
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    C stands for cost /concentration and A is for amount

  8. timo86m
    • 3 years ago
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    |dw:1363159234819:dw| x can equal c*a which is cost

  9. mariannu
    • 3 years ago
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    I just want to know how you can plug in the box and transferring it into that equation. XD I forgot to add more detail to the drawing XD

  10. timo86m
    • 3 years ago
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    |dw:1363159271478:dw|

  11. mariannu
    • 3 years ago
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    How do you know which box to plug in the numbers? Like which number goes to which box square?

  12. timo86m
    • 3 years ago
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    maybe i am just guessing but you dont need the box the box is just a visual aid.

  13. mariannu
    • 3 years ago
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    |dw:1363159386553:dw|

  14. mariannu
    • 3 years ago
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    wel lI am more of a visual learner. :P XD

  15. timo86m
    • 3 years ago
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    |dw:1363159532318:dw|

  16. mariannu
    • 3 years ago
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    I got 60 as well. XD But its asking the cost per oz of mixture. So is it just 60?

  17. mariannu
    • 3 years ago
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    Or 10

  18. timo86m
    • 3 years ago
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    60/6=10 :)

  19. mariannu
    • 3 years ago
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    So then I am correct. XD

  20. timo86m
    • 3 years ago
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    yes :)

  21. mariannu
    • 3 years ago
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    Why did he have to make it complicated like that . may I ask you one more question for another math problem

  22. mariannu
    • 3 years ago
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    A chemist wants to mix 12 grams of 10 percent salt solution with some 75 percent salt solution to get a 20 percent salt solution. How many grams of the 75 percent salt solution are needed? I got an answer of 2.18

  23. mariannu
    • 3 years ago
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    or 2.48

  24. timo86m
    • 3 years ago
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    idk tho not 100 sure

  25. mariannu
    • 3 years ago
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    ok then thanks though I appreciate your help ^.^ I will figure out the rest on my own by examining the review I went over with m teacher thank you.

  26. timo86m
    • 3 years ago
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    btw i am wrong on that last one

  27. timo86m
    • 3 years ago
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    2.608695652 now i get

  28. timo86m
    • 3 years ago
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    1/120+2/(4*a) = (20/100) is formula

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