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-   -   Combined inequalities (https://www.askmehelpdesk.com/showthread.php?t=232315)

  • Jun 30, 2008, 07:57 AM
    sunshine08
    Combined inequalities
    1)d - 1 > -3 and d + 2 < 5

    2) -3k + 7 > -5 and -7k + 5 < -2

    3) -5 < 2y - 3 < 23

    4) x - 4 < 5 or x + 2 > 15

    5) 5x - 4 > 6 or -4x + 5 > 1
  • Jul 1, 2008, 04:32 AM
    Unknown008
    1) Solve them separately first, d>-3+1, d>-2 and d<5-2, d<3
    Therefore, d>-2 and d<3, simplify, -2<d<3

    2) Can you do that now?

    3) -5 <2y-3 <23 add 3 everywhere: -2<2y<26
    Divide by two everywhere: -1<y<13

    4) & 5) Same as method as 1)

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