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anonymous

  • 5 years ago

I still need help with the following problems...

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  1. anonymous
    • 5 years ago
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  2. anonymous
    • 5 years ago
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    If you can't open them, I'll type them out for you. My HW website won't let me copy and paste.

  3. TuringTest
    • 5 years ago
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    I can't open the file...

  4. anonymous
    • 5 years ago
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    evidently the line through (7,7) meets y = x at (7,7) !!

  5. anonymous
    • 5 years ago
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    #15) Find the intersection of the line through points (7,7) and (4,2) with the line y=x. The point of intersection is (A,B) where A=___ B=___

  6. anonymous
    • 5 years ago
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    \[x^2-3\] intersect the x axis at \[\sqrt{3}\] and \[-\sqrt{3}\] and the distance between these to points is \[2\sqrt{3}\]

  7. anonymous
    • 5 years ago
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    #15 not to be snarky, but it is asking who is buried in grant's tomb. if it goes through (7,7) that is where y = x

  8. anonymous
    • 5 years ago
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    for #20 you have to decide which rule to use. since \[-1\leq 2\] you know \[f(-1)=2\times -1=-2\]

  9. anonymous
    • 5 years ago
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    since \[x>2\] =you use \[f(3)=6\times 3^2+3+4\]

  10. anonymous
    • 5 years ago
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    and since \[2 \leq 2\] is true you use \[f(2)=2\times 2=4\]

  11. anonymous
    • 5 years ago
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    yeah, i knew that i had to do that for 20 but i got the wrong answer for some reason... for 18, i dont know why the answer is not 3 or 4.

  12. anonymous
    • 5 years ago
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    because you are asked for the distance between \[(-\sqrt{3},0)\] and \[(\sqrt{3},0)\] and that is \[2\sqrt{3}\]

  13. anonymous
    • 5 years ago
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    o sorry, didnt see u solved #18 too cause u didnt put the # in front of it.

  14. anonymous
    • 5 years ago
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    so how did u get those numbers for #18? im a little confused on that

  15. anonymous
    • 5 years ago
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    and for #20 i got -2, 61, and 30 but those are wrong... why?

  16. Mertsj
    • 5 years ago
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    Do you know how to find the points where the parabola crosses the x axis?

  17. anonymous
    • 5 years ago
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    no...

  18. Mertsj
    • 5 years ago
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    If a point is on the x axis, the y value is 0 so set y = to 0 and solve

  19. anonymous
    • 5 years ago
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    so i would get plus minus radical 3

  20. Mertsj
    • 5 years ago
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    Yes. So the parabola crosses the x axis at (sqrt3,0) and (-sqrt3,0)

  21. Mertsj
    • 5 years ago
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    But the question doesn't ask for the two points. It asks for the distance between the points. Do you know how to find the distance between two points?

  22. anonymous
    • 5 years ago
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    distance formula

  23. Mertsj
    • 5 years ago
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    yep

  24. anonymous
    • 5 years ago
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    what was that again?

  25. anonymous
    • 5 years ago
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    cant keep track of all the formulas

  26. Mertsj
    • 5 years ago
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    \[d=\sqrt{(x _{2}-x _{1})^{2}+(y _{2}-y _{1})^{2}}\]

  27. anonymous
    • 5 years ago
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    Thanks a lot!

  28. Mertsj
    • 5 years ago
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    |dw:1327017935457:dw|

  29. Mertsj
    • 5 years ago
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    Did you get it

  30. anonymous
    • 5 years ago
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    im getting a decimal when i subtract - radical 3 and radical 3

  31. anonymous
    • 5 years ago
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    im using my calc btw

  32. anonymous
    • 5 years ago
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    ok nvm

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spraguer (Moderator)
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is replying to Can someone tell me what button the professor is hitting...

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