Anonymous
Anonymous asked in Science & MathematicsMathematics · 2 months ago

A pharmacist has two vitamin-supplement powders. The first powder is 20% vitamin B1 and 30% vitamin B2. The second is 15% vitamin B1 and ..?

A pharmacist has two vitamin-supplement powders. The first powder is 20% vitamin B1 and 30% vitamin B2. The second is 15% vitamin B1 and 10% vitamin B2. How many milligrams of each powder should the pharmacist use to make a mixture that contains 130 mg of vitamin B1 and 180 mg of vitamin B2?

first powder=        mg

second powder=       mg

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  • 2 months ago

                B1.        B2

    p1=x    20%.      30%

    p2 =y.   15%.      10%

    B1=180mg

    B2=140mg

    2(.3x+   .1y = 130)

    3(.2x + .15y = 180)

    .6x +  .20y =260

    .6x +  .45y. =540

             y=1120mg = first powder

    .6x + .20(1120)=260

    .6x=36

              x=60mg=second powder

    • Nurse2 months agoReport

      Says it is incorrect :(

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