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iwanttogotostanford

  • one year ago

ACT MATH REVIEW PLEASE HELP: what is the slope of any parallel line to the line 7x+9y=6?

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  1. iwanttogotostanford
    • one year ago
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    @Vocaloid

  2. Vocaloid
    • one year ago
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    well, first calculate the slope, do you know how do to that?

  3. iwanttogotostanford
    • one year ago
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    y2-y1/x2-x1

  4. Vocaloid
    • one year ago
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    uh, well, that would work if we were given two points, but we don't have that here, so we're going to use a different method

  5. Vocaloid
    • one year ago
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    are you familiar with the equation y = mx + b?

  6. iwanttogotostanford
    • one year ago
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    yes

  7. Vocaloid
    • one year ago
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    well, we're going to take our equation 7x + 9y = 6 and re-arrange it so it looks like y = mx + b so let's start off with 7x + 9y = 6 subtract 7x from both sides, what do you get?

  8. iwanttogotostanford
    • one year ago
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    9y=-1x

  9. Vocaloid
    • one year ago
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    uh, not quite remember, you can't combine 7x and 6, so we leave it like this: 9y = 6 - 7x, with me so far?

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