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Tuesday, September 28, 2010

hw #1-7

hw #1-7
pg 64 #8-22, #26-28
pg 69 #1-74 multiples of 3

11 comments:

  1. About ordered pairs--
    if the equation was
    y= x-3
    and the order pair is (6,3) would that be correct even if it isn't in the right order?

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  2. And how are you supposed to answer that question? Just 'Yes' or 'No'?

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  3. Think about it for a second... Would the math gods call it an ORDERED PAIR, if order didn't matter? (jeopardy music...da-da-da-da, da-da-da) ok times up! Whaddya say? YES or NO? (yup, that's all it is... yes or no)

    btw, in your example, the ORDER is correct, right?

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  4. Ok thank you :)
    I thought about it and it seemed kinda obvious.
    And in my example, the order is NOT correct-- I hope.

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  5. uhhh... recall that an ordered pair is (x,y)... does that change your yes/no answer?

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  6. Ohhh, well that changes everything, i forgot about that. Then yes, it is correct.

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  7. i'm confused...what are the ordered pairs...how would 'x' change into six.

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  8. In the example above, you are being asked to substitute the (x,y) ordered pair with a value of (6,3) - i.e. x=6, y=3... into the equation:

    y = x - 3

    so, substituting for x and y we get:

    (3) = (6) - 3

    ... which is a true statement.

    SO, the given ordered pair (6,3) makes the equation true.

    Ca-peesh?

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