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Math Help - Multiple choice

  1. #1
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    Multiple choice

    can someone please help me understand this question?

    Thank You :-)



    A certain preparation consists of liquids x, y, and z in the proportion 5:2:1. How many gallons of the preparation can be made from a stock of materials consisting of 25 gallons of x, 20 gallons of y, and 8 gallons of z?

    A. 25
    B. 40
    C. 80
    D. 53
    E. 50
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by run_run_3 View Post
    can someone please help me understand this question?

    Thank You :-)



    A certain preparation consists of liquids x, y, and z in the proportion 5:2:1. How many gallons of the preparation can be made from a stock of materials consisting of 25 gallons of x, 20 gallons of y, and 8 gallons of z?

    A. 25
    B. 40
    C. 80
    D. 53
    E. 50
    multiply the proportion by an appropriate constant. in this case, 5. multiplying through by 5 we have 25:10:5. so we have 25 gallons of x, 10 gallons of y and 5 gallons of z. now add them up
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