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Math Help - inequalities

  1. #1
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    Cool inequalities

    Solve each inequality and graph its solution.

    A) ?5)8+r > 3 B) ? 6)-8k+6 < 94
    4






    -1 0 1 2 3 4 5 6 7 - 13 -12 -11 -10 -9 -8 -7
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  2. #2
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    \displaystyle \frac{8+r}{4}\geq 3

    \displaystyle 8+r\geq 12

    \displaystyle r\geq 4
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  3. #3
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    -8k+ 6\le 94

    There are two ways to do this:
    1) Add 8k to both sides- \6\le 94+ 8k. Then subtract 94 from both sides- 6- 94= -88\le 8k. Finally, divide both sides by 8- -88/8= -11\le k.

    or

    2) Subtract 6 from both sides; -8k\le 94- 6= 88. Divide both sides by -8 but remember that when you multiply or divide an inequality by a negative number you must "reverse" the inequality sign- k\ge 88/8= 11
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