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Joint Variation Practice 2 - Visualizing Algebra

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    With joint variation, though, the variations do not both need to be direct. One
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    quantity might have direct variation, while the other might have inverse
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    variation. For example, if x and y had direct variation, they would both
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    increase, or they would both decrease. And if z varied inversely with x, then if
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    x increased, z would have to decrease. When setting up the proportion, this
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    means that since x varies directly with y, they will be directly across from one
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    another. But since x varies inversely with z, we'll see this z quantity in the
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    denominator. We flip this fraction. So let's assume this is still true. X is
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    varying directly with y, and inversely with z. If the value of x is 10 when y
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    equals 5 and z equals 6. I want you to find the value of x when y is 7 and z is
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    1. As a hint, this is one case, this x could be 10, this y is 5, and this z is
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    6. So you try and fill in the other values and then solve for x. And keep in
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    mind in the setup, we had direct variation with y, so this is directly across
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    from each other Whereas we had inverse variation with c. This c is a
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    denominator. Write your answer for x here. You can also think about we're really
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    finding x too, this value. Good luck.
Cím:
Joint Variation Practice 2 - Visualizing Algebra
Video Language:
English
Team:
Udacity
Projekt:
MA006 - Visualizing Algebra
Duration:
01:20
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