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COUNTRY_BOY_HATES_PCS Group Title

2. The manager of a fish store has water that is 10% salt and water that is 25% salt. He needs to fill an aquarium with 5 gallons of water that is 20% salt. a. Write a system of linear equations that you can use to determine how many gallons of each type of salt water the manager should combine. Be sure to define your variables. b. Solve the system and determine how many gallons of each type of salt water the manager should combine.

  • 11 months ago
  • 11 months ago

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  1. ksrakhilesh Group Title
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    10x+25y=20(x+y) x+y=5

    • 11 months ago
  2. *STAR* Group Title
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    ok so what part of this do you not understand

    • 11 months ago
  3. COUNTRY_BOY_HATES_PCS Group Title
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    None of it... -_-

    • 11 months ago
  4. *STAR* Group Title
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    umm ok wow, hold on i'll try and solve it

    • 11 months ago
  5. ksrakhilesh Group Title
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    10 percent 5/3 gallons 25 percent 10/3 gallons

    • 11 months ago
  6. mathstudent55 Group Title
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    @COUNTRY_BOY_HATES_PCS Do you understand it now?

    • 11 months ago
  7. heather040200 Group Title
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    Let x = amount of 10% salt and y = amount of 25% salt x + y = 5 Two ways (which are quite equivalent): #1: Find ratio of x to y, independent of the actual volume: x / 10 + y / 4 = (x + y) / 5 4x + 10y = 8x + 8y 4x = 2y y = 2x Then bring in the total volume: x + y = 5 x + 2x = 5 3x = 5, x = 5/3, y = 2x = 10/3 #2 More traditional method y = 5 - x (Salt from x) + (salt from y) = (total salt in the mix) .10 x + .25 (5 - x) = .2 * 5 = 1 10x + 125 - 25x = 100 -15x = -25 x = 5/3 y = 5 - 5/3 = 10/3

    • 11 months ago
  8. kathy0514 Group Title
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    http://www.algebra.com/algebra/homework/word/Linear_Equations_And_Systems_Word_Problems.faq.question.684153.html that might help

    • 11 months ago
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