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Thread: Help Help!!!

  1. #1
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    Help Help!!!

    Here some problems i need help with:

    1)
    Write the numerical coefficient of -7c^9d^2

    2)
    Write the probability of getting a number over 4 of two successive of single die

    3)
    Write equation that equivalent to 16-x=0

    4)
    The numerical coefficient of the product of (x-8)(x-5) equals= ?
    5)
    write the slope-intercept form of 3x=16+4y.

    6)
    The slope of line parallel to -x+y=12 equals____
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  2. #2
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    Quote Originally Posted by mathelp
    Here some problems i need help with:

    1)
    Write the numerical coefficient of -7c^9d^2
    In $\displaystyle -7c^9d^2$ the coefficient is number in front of variable(s) thus it is -7.

    Quote Originally Posted by mathelp
    2)
    Write the probability of getting a number over 4 of two successive of single die
    That means either 5 or 6 and there are 6 possibilities thus,
    the probability is $\displaystyle 2/6=1/3$

    Quote Originally Posted by mathelp
    3)
    Write equation that equivalent to 16-x=0
    Not sure, what you want. Add $\displaystyle x$ to both sides to get,
    $\displaystyle 16=x$

    Quote Originally Posted by mathelp
    4)
    The numerical coefficient of the product of (x-8)(x-5) equals= ?
    Not sure what you want. You need to use F.O.I.L on $\displaystyle (x-8)(x-5)$ which gives $\displaystyle x^2-5x-8x+40$ collect terms to get, $\displaystyle x^2-13x+40$

    Quote Originally Posted by mathelp
    5)
    write the slope-intercept form of 3x=16+4y.
    Slope-intercept form means basically solve for $\displaystyle y$. First subtract 16 from both sides to get, $\displaystyle 3x-16=4y$ now divide by 4 both sides to get,
    $\displaystyle y=\frac{3}{4}x-4$

    Quote Originally Posted by mathelp
    6)
    The slope of line parallel to -x+y=12 equals____
    First write it in slope-intercept form. Which is $\displaystyle y=x+12$. Any line parallel to this one has the same slope. The slope in the coffecient of the $\displaystyle x$ which over here is 1 because $\displaystyle 1x=x$.
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