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Math Help - help with radicals

  1. #1
    Junior Member
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    Unhappy help with radicals

    the expression √x < 9 (x >0) is equivalent to which of the following:

    a) x < 81
    b) x < 3
    c) x < 9

    simplify:
    √8 /3 + √18/2

    a) 13√2/6
    b) √8+√18/5
    c) √8+√18/6
    d)5√26/6


    find the x and y intercepts of the line: 2y-4x+4=0



    find the slope of the line: 2y-4x+4=0
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  2. #2
    MHF Contributor
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    Show your work please.
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  3. #3
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    Quote Originally Posted by BeBeMala View Post
    the expression √x < 9 (x >0) is equivalent to which of the following:

    a) x < 81
    b) x < 3
    c) x < 9

    simplify:
    √8 /3 + √18/2

    a) 13√2/6
    b) √8+√18/5
    c) √8+√18/6
    d)5√26/6


    find the x and y intercepts of the line: 2y-4x+4=0


    find the slope of the line: 2y-4x+4=0
    Q1 The options themselves suggest you should square both sides.

    Q2 Simplify each surd and then add the fractions by putting them both over the lowest common denominator.

    Q3 Substitute x = 0 and solve for y. Substitute y = 0 and solve for x.

    Q4 Re-arrange it into the form y = mx + c.
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  4. #4
    Newbie TheJosephOuellette's Avatar
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    Here is the question for find the slop and y-intercept - http://img227.imageshack.us/img227/7...rceptsolve.jpg

    EDIT - Didnt see you needed x-ints too, here is the complete work for the bottom two questions. - http://img189.imageshack.us/img189/7...rceptsolve.jpg
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  5. #5
    MHF Contributor
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    Your equations seems to be (hard to read) 2y - 4x + 4 = 0

    First, simplify by dividing by 2:
    y - 2x + 2 = 0
    Now, re-arrange:
    y = 2x - 2

    Since y = mx + b means b = y-intercept, then y-intercept = -2

    Now show us how you get the x-intercept...

    Btw, do you know what the "m" means?

    NOTE: next time, start your own thread.
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