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Thread: Please help.

  1. #1
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    Please help.

    If 8 ounces of steak costs $1.74, how much does 12 ounces of steak cost?

    The directions here are: Write a proportion as your first step in solving each problem.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by stlwhitesheep View Post
    If 8 ounces of steak costs $1.74, how much does 12 ounces of steak cost?

    The directions here are: Write a proportion as your first step in solving each problem.
    ok, follow the hint, write your proportion

    the steak costs $\displaystyle \frac {\$ 1.74}{8 \text{ ounces}}$

    now what do you have to multiply this by to get 12 ounces in the denominator? or better yet, since the cost per unit ounce is to remain constant, write $\displaystyle \frac {\$ 1.74}{8 \text{ ounces}} = \frac {\$ x}{12 \text{ ounces}}$, now solve for x
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  3. #3
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    Thanks, however there's more

    Ok, the answer i have is

    c $1.74

    12 = 8

    but how do i solve this?
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by stlwhitesheep View Post
    Ok, the answer i have is

    c $1.74

    12 = 8

    but how do i solve this?
    i don't understand what you typed. you are solving $\displaystyle \frac {1.74}8 = \frac x{12}$ for $\displaystyle x$
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  5. #5
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    ..

    the easiest way to think about it is do $1.74 / 8 to get the value of a 1 ounce steak and then times that by 12 to getthe value of a 12 ounce steak
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  6. #6
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    1.74 x
    8 = 12

    Now, cross multiply: 8x = 1.74 x 12
    Multiply: $\displaystyle 8x = 20.88$
    Divide by 8: x = $2.61
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