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anonymous

  • one year ago

-2n ≥ 8 or n+3<7 please show step by step and explain

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  1. noseboy908
    • one year ago
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    Do you have to graph the two to solve for n? Or what further instructions do you have?

  2. anonymous
    • one year ago
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    just solving for n. no graphing

  3. noseboy908
    • one year ago
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    Good! That makes it easier. Let's start with the first equation. "-2n ≥ -4" Start by trying to isolate n. Do you know how to do that?

  4. anonymous
    • one year ago
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    i actually already solved them. n ≤ -4 or n < 4. I just don't understand why the back of the book says the answer is only n<4

  5. noseboy908
    • one year ago
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    The first equation has an error. See if you can spot it.

  6. noseboy908
    • one year ago
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    And don't overthink it. You got the more complicated part correct, but missed a...simpler part.

  7. anonymous
    • one year ago
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    Oh, i typed the equation incorrectly. it's suppose to be -2n≥8 or n+3<7.

  8. noseboy908
    • one year ago
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    Well that changes things. One moment.

  9. anonymous
    • one year ago
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    sorry

  10. noseboy908
    • one year ago
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    Don't apologize, it was actually my mistake. Now, is this one of the problems that the book gives the answer to so you can solve for it and see if you got it right?

  11. anonymous
    • one year ago
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    to see if i got it right

  12. noseboy908
    • one year ago
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    That's odd, and I'll explain why. My thought process would be to accept n ≤ 4 as correct, as it already includes all that "n < 4" would contain, plus the addition of the answer also possibly being 4. Now, to check my answer, I'm going to ask some others of their opinion on this.

  13. noseboy908
    • one year ago
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    @amistre64 , @ganeshie8 , or @Luigi0210 , could you shed some light?

  14. amistre64
    • one year ago
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    -2n ≥ 8 or n+3<7 n < = -4 or n < 4 |dw:1440981200481:dw| n<4 contains n<= -4 so to avoid redundancy ... the solution set is simply all values less then 4

  15. amistre64
    • one year ago
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    if you were going to pick all the points in the number line that form a solution ... you would define it as all points less then 4 and be done with the explanation.

  16. anonymous
    • one year ago
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    oh, I see now. thank you so much for helping everyone!

  17. amistre64
    • one year ago
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    in set notation ... i dont think you know set notation if D is contained within A, then the union of A with D, is just A ... since D is already a part of A to start with.

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