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anonymous

  • 5 years ago

2 l -x+4 l > 10 solve for X

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  1. anonymous
    • 5 years ago
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    6l-10>x

  2. anonymous
    • 5 years ago
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    theres arent ls haha sorry those are absolute values

  3. anonymous
    • 5 years ago
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    those*

  4. anonymous
    • 5 years ago
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    oh :D

  5. anonymous
    • 5 years ago
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    if you could tell me how to do it that be great i now i have to divide by 2.... but does that change the signn.

  6. anonymous
    • 5 years ago
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    yes that is the first step. no it does not change the sign

  7. anonymous
    • 5 years ago
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    than you have to divide it to two parts. when x>= 4 than the absolute value does nothing so you get -x+4 >5 -1>x this is contradiction as x cannot be bigger than 4 and smaller than -1 at the same time

  8. anonymous
    • 5 years ago
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    whered you get negative one the -x will become positive so i wouldnt have to divide right..? then i would have to do this problem again with flipping the sign and negating the 10

  9. anonymous
    • 5 years ago
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    the second part is when 4>=x than the absolute value multiplies it by -1 so you get x-4>5 x>9 this is another contradiction so I must have done something wrong :) time to double check

  10. anonymous
    • 5 years ago
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    try this: \[|-x+1|=|1-x|=|x-1|\] now you don't have that annoying minus sign in front of the x. \[2|x-1|>10\] \[|x-1|>5\] \[x-1>5\]or \[x-1<-5\]

  11. anonymous
    • 5 years ago
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    there is no contradiction. you have two easy inequalities to solve.

  12. anonymous
    • 5 years ago
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    Satellite that answer is incorrect this is a muiltiple choice question and the only answers are with 1 and 9 ... there was no need to move the -x when its in an absolute value sign the - drops anyway which is where the problem may be with your solution

  13. anonymous
    • 5 years ago
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    sat it is not -x+1 but -x+4

  14. anonymous
    • 5 years ago
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    Hahah thanks Andras that could be the problem as well haha

  15. anonymous
    • 5 years ago
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    oops i read it as \[-x+1\] not \[-x+4\] i apologize.

  16. anonymous
    • 5 years ago
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    yeah the answer should be x>9 or -1>x

  17. anonymous
    • 5 years ago
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    sorry. messed up by not reading carefully.

  18. anonymous
    • 5 years ago
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    the choices are 1<x<9 (x<1) or (x>9) (x<-9) or (x>-1) (x<-1)or(x>9)

  19. anonymous
    • 5 years ago
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    (x<-1)or(x>9)

  20. anonymous
    • 5 years ago
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    ok thanss both for the help :]

  21. anonymous
    • 5 years ago
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    thanks*

  22. anonymous
    • 5 years ago
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    \[21-x+41>10\] Collect like terms on RHS \[62-x >10\] Subtract 10 from both sides; \[52-x >0\] Add x to both sides \[52>x\] That is;\[x <52\]

  23. anonymous
    • 5 years ago
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    Those are absolute values... not 1..

  24. anonymous
    • 5 years ago
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    i got the answer already :]..

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