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anonymous

  • one year ago

can you please check if i am correct?

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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  3. anonymous
    • one year ago
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    @Elsa213

  4. mathmate
    • one year ago
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    #1, 2 are correct. #3 hint: -x<4 is the same as x>-4 (i.e. the direction of inequality is reversed when you negate an inequality) #4 "or" means either one works, so the two part-answers are additive #5 is correct #6 work out the two cases 2x+4>14 and -2x-4>14 then take intersection of the two results, i.e. the part of the result that satisfies both cases. #7 draw on number line each option and figure out the right answer, which should be equivalent to -40<F<257 #8 is correct.

  5. anonymous
    • one year ago
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    thanks! @mathmate

  6. mathmate
    • one year ago
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    you're welcome! :)

  7. anonymous
    • one year ago
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    @mathmate for 3 it would be D right? and can you help me figure out 7 please?

  8. anonymous
    • one year ago
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    and let me rephrase that. for 3 it would be A right? @mathmate

  9. mathmate
    • one year ago
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    #3 3<x<6 is correct. Please state the values when checking the answer, instead of the letters. For #7, recognize that 5/9(F-32) is the same temperature in Celsius. Also, all options have two separate inequalities, so you need the equivalent of -40<F, or -40<C, for the lower limit, and F<257 or C<125 for the upper limit. So check out each option to see which one has both conditions.

  10. anonymous
    • one year ago
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    @mathmate 3<x<6 would be A am i correct?

  11. mathmate
    • one year ago
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    For #3, 3<x<6 would be correct. I will leave that to you to find the options! Remember that an empty dot refers to strict inequality, and a solid dot refers to >= or <=.

  12. anonymous
    • one year ago
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    @mathmate thanks

  13. anonymous
    • one year ago
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    @Michele_Laino

  14. Michele_Laino
    • one year ago
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    -40 F= -40 C furthermore: 125 °C= 257 °F I have used this formula: \[F = \frac{9}{5}C + 32\]

  15. anonymous
    • one year ago
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    @Michele_Laino can you help me figure the ones that are not correct out please?

  16. Michele_Laino
    • one year ago
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    it is simple, you have to compute how many Fahrenheit degrees are these temperatures -40 C and 125 C

  17. anonymous
    • one year ago
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    -40 C = -40 F 125 C = 257 F what would i do next ?

  18. anonymous
    • one year ago
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    @Michele_Laino i know its either A or B now

  19. Michele_Laino
    • one year ago
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    It is option B)

  20. anonymous
    • one year ago
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    thankss!! can you help me out with #3?

  21. Michele_Laino
    • one year ago
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    here we have to solve this inequality: \[ - 13 > - 5x + 2 > - 28\]

  22. Michele_Laino
    • one year ago
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    actually, they are two inequalities

  23. anonymous
    • one year ago
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    what would they be? @Michele_Laino

  24. Michele_Laino
    • one year ago
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    the first inequality is: \[ - 13 > - 5x + 2\] whereas the second one is: \[ - 5x + 2 > - 28\] please solve them

  25. anonymous
    • one year ago
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    first: X>3 second: X<6 correct? @Michele_Laino

  26. Michele_Laino
    • one year ago
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    yes! correct!

  27. anonymous
    • one year ago
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    @Michele_Laino I'm thinking a what do you think?

  28. anonymous
    • one year ago
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    @Michele_Laino

  29. anonymous
    • one year ago
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    @mathstudent55

  30. Michele_Laino
    • one year ago
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    yes! correct!

  31. anonymous
    • one year ago
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    THANK YOUUU! look. i know I'm really annoying and everything but can you please help me with 4? @Michele_Laino

  32. Michele_Laino
    • one year ago
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    here, you have to solve these inequalities: \[\Large \begin{gathered} 4p + 1 > - 7 \hfill \\ 6p + 3 < 33 \hfill \\ \end{gathered} \] what do you get?

  33. anonymous
    • one year ago
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    P>-2 P<5 @Michele_laino

  34. Michele_Laino
    • one year ago
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    so, what is the right option?

  35. anonymous
    • one year ago
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    @Michele_Laino i don't know. the person up there said it wasn't A so i don't know

  36. Michele_Laino
    • one year ago
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    I think it is A

  37. anonymous
    • one year ago
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    can you teach me find the 2 inequalities so that i can solve 6 please? @Michele_Laino

  38. Michele_Laino
    • one year ago
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    the proposed inequlity is equivalent to these two systems of inequalities: \[\Large \left\{ \begin{gathered} 2x + 4 < 14 \hfill \\ 2x + 4 \geqslant 0 \hfill \\ \end{gathered} \right. \cup \left\{ {\begin{array}{*{20}{c}} { - 2x - 4 < 14} \\ {2x + 4 < 0} \end{array}} \right.\] please solve them

  39. anonymous
    • one year ago
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    for both them is (-2,5) (-9,2) @Michele_Laino right?

  40. Michele_Laino
    • one year ago
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    the first inequality gives x>-9 and the second one gives x<-2, so the intersection is: (-9,-2)

  41. Michele_Laino
    • one year ago
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    the first solution is correct!

  42. Michele_Laino
    • one year ago
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    more precisely the first solution, is: [-2,5)

  43. anonymous
    • one year ago
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    quick question though. theres a point on a -5 on the number line and you got a -2.... is it supposed to be like that? @Michele_Laino

  44. Michele_Laino
    • one year ago
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    I don't understand, please specify more

  45. anonymous
    • one year ago
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    never mind i am seeing double from not sleeping my bad sorry haha @Michele_Laino

  46. Michele_Laino
    • one year ago
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    ok! :)

  47. anonymous
    • one year ago
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    @t.ashleyxx

  48. anonymous
    • one year ago
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    @HelloKitty17

  49. anonymous
    • one year ago
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    What would seem to be the problem?

  50. anonymous
    • one year ago
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    let me update this. because i fixed some questions. @t.ashleyxx

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