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anonymous

  • one year ago

Can someone please help me with precalc? Can you just explain it to me please? In the lesson it said nothing about this, but I am sure it's easy, I just really don't understand. Please Help Use the graph below to show which numbered region belong to the graph of the solution set of each system of questions. http://assets.openstudy.com/updates/attachments/5405c9a6e4b0f2ed1e14d718-timaashorty-1409665469258-untitled.png Please explain, don't give me the answer! Thank you so much in advance!

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  1. anonymous
    • one year ago
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    just a sec, i'll be right back to help

  2. anonymous
    • one year ago
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    Ok, thank you so much!

  3. anonymous
    • one year ago
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    first, identify the lines, ingnoring the inequality. line in #2, identify the line x =0 and the line y = x

  4. anonymous
    • one year ago
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    |dw:1441217653219:dw|

  5. anonymous
    • one year ago
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    ok so its a vertical line? for x=0?

  6. anonymous
    • one year ago
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    correct and it divides the plane into 2 regions... which region satisfies the inequality x>= 0?

  7. anonymous
    • one year ago
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    hmm, if it was > or = to wouldn't that mean that it would be shaded on the right side?

  8. anonymous
    • one year ago
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    |dw:1441217779384:dw|

  9. anonymous
    • one year ago
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    correct! now we draw in the line y = x...

  10. anonymous
    • one year ago
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    ok, http://www.regentsprep.org/regents/math/algebra/ac5/pracgraph1.gif

  11. anonymous
    • one year ago
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    |dw:1441217904240:dw| which part satisfies the inequality y <= x?

  12. anonymous
    • one year ago
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    hmm, I believe it would be on the right side of the line y=x? Since it is < or = to?

  13. anonymous
    • one year ago
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    great!

  14. anonymous
    • one year ago
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    |dw:1441218086190:dw| now which region satisfies both of the inequalities?

  15. anonymous
    • one year ago
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    The section of it on the right side of the x-axis?

  16. anonymous
    • one year ago
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    |dw:1441218200528:dw|

  17. anonymous
    • one year ago
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    make sense?

  18. anonymous
    • one year ago
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    Ok thank you, yes it does. So to answer that I would need to put it into a (x, y) form?

  19. anonymous
    • one year ago
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    no, look at the question... it's asking what region or regions belong to the solution set. the regions are numbered so you must provide all of the numbers that relate to the proper region(s). what number(s) are valid?

  20. anonymous
    • one year ago
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    any point within the region or regions must satisfy both inequalities.

  21. anonymous
    • one year ago
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    Oh ok, sorry. So for that I would need to pick a plot and put it into the inequalities like an equation?

  22. anonymous
    • one year ago
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    no... look at your link! see the numbers on the graph? what shape does number 5 pertain to?

  23. anonymous
    • one year ago
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    ok, looking. So all of the numbers would have to satisfy both and the ones pictured in the original graph?

  24. anonymous
    • one year ago
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    |dw:1441218845167:dw|oops, this is the region represented by 5

  25. anonymous
    • one year ago
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    Ok so it would be all the points inside that section that would represent the region(s)?

  26. anonymous
    • one year ago
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    yes. is region 5 in the solution set?

  27. anonymous
    • one year ago
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    No, I am not sure. Would it have to be something like x=5 or in that format? Or would I just simply list region 5? Sorry trying to make sure I understand the whole process.

  28. anonymous
    • one year ago
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    region 5 represents an infinity of points... you are only supposed to list the numbers of the regions, separated by commas. you need to read and understand the question before you can hope to answer it with any confidence and understanding. the region number is a simple way of identifying all the points within that region. just like California identifies all the points on the globe that are within the region defined as California.

  29. anonymous
    • one year ago
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    So it would simply be 5? Since it is talking about regions and everything within 5 as you were saying would satisfy the inequalities. I apologize, this is a fairly easy concept I am sure, I just am relatively turned around.

  30. anonymous
    • one year ago
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    you have to list ALL regions that satisfy the inequalities, separated by a comma. is 5 the ONLY region that satisfies the inequality? if so, then just put 5. If not, then you will have to put 5 and thena comma and then the next number and so on... good luck!

  31. anonymous
    • one year ago
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    Ok, thank you so much! Medaled and fanned!

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