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gdogthegirl

  • 3 years ago

Help please!? The sales tax on a new car varies directly to(or is directly proportional) the price of the car. If $1,800 in sales tax is paid for a $25,000 car. what is the purchase price of a car worth $1,600 in sales tax? Im totally lost when it comes to variations :(

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  1. gdogthegirl
    • 3 years ago
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    could you show the steps too?

  2. tcarroll010
    • 3 years ago
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    It's a question in proportions. 1800 is to 25000 as 1600 is to x. Are you with me so far?

  3. gdogthegirl
    • 3 years ago
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    yes

  4. gdogthegirl
    • 3 years ago
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    but im not supposed to use proportions

  5. gdogthegirl
    • 3 years ago
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    its for variations like this is a direct variation

  6. tcarroll010
    • 3 years ago
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    "varies directly" is the same as proportions. You will use an equation like a/b = c/x.

  7. tcarroll010
    • 3 years ago
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    1800 = a. 25000 = b. 1600 = c. Just get x

  8. li_za12
    • 3 years ago
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    25000/1800 = x/1600 25000/1800 = 13.89 1800 x 13.89 = 25 1600 x 13.89 = x

  9. gdogthegirl
    • 3 years ago
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    the equation they gave to use to use was y=kx ^{n} \]

  10. gdogthegirl
    • 3 years ago
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    y=kx squared to n

  11. tcarroll010
    • 3 years ago
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    What is your value for k?

  12. gdogthegirl
    • 3 years ago
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    that what i dont know

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