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Math Help - Solving for unknown varilable

  1. #1
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    Solving for unknown varilable

    How do you solve this problem. Please provide step by step details. Thanks!
    Solve for B
    V=1/3 Bh
    V=20, h=4
    (Note: I could not do fractions so 1/3 is a fraction)

    Solve for h
    A=1/2(B+b)h
    A=49.5, B=17, b=16
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  2. #2
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    e^(i*pi)'s Avatar
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    For the first one if you divide both sides by \dfrac{h}{3} you will make B the subject: B = \dfrac{3V}{h}
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  3. #3
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    here is how i did the second equation.

    49.5={\frac {1}{2}}(17+16)h

    (2)49.5=(17+16)h multiply through by {\frac {2}{1}} to clear fraction.

    99=(33)h multiply left side and sum numbers in brackets on right.

    {\frac {99}{33}}={\frac {33}{33}}h divide both sides by 33.

    3=h

    hope that helps.
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