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Math Help - Finding the tip

  1. #1
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    Finding the tip

    A meal costed $25.00 and the total cost of the restaurant bill is $31. Tax and tip are unknown. If the ratio of the amount of the tax to the amount of the tip is 1 to 3, what is that amount of the tip?

    Why is is $4.50?
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  2. #2
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    Re: Finding the tip

    Quote Originally Posted by mjoshua View Post
    A meal costed $25.00 and the total cost of the restaurant bill is $31.
    So Tax and tip together are 31- 25= $6.00

    Tax and tip are unknown. If the ratio of the amount of the tax to the amount of the tip is 1 to 3
    So the tax is 3 times as large as the tip. If we call the amount of the tip "t", then the amount of the tax is 3t.

    , what is that amount of the tip?
    tip+ tax= t+ 3t= 6. Solve that equation for t.

    Why is is $4.50?
    It isn't. According to you the question asked for the "amount of the tip" $4.50 is the amount of the amount of the tax.
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  3. #3
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    Re: Finding the tip

    Yes, I gave the question verbatim so now what..? I guess I need the right formula for the tip then to obtain $4.50?
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