luke107
luke107 luke107
  • 03-04-2018
  • Mathematics
contestada

solve inequality
-15<-3k-2k

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sophyyyy
sophyyyy sophyyyy
  • 03-04-2018

[tex] - 15 < - 3k - 2k \\ - 15 < - 5k \\ \frac{ - 15}{ - 5} > k \\ 3 > k \\ k < 3[/tex]
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ali015
ali015 ali015
  • 03-04-2018
Your inequality is: -15 < -3k - 2k

Start by subtracting 2k from -3k because they are the same term: -3k - 2k = -5k. Now you have: -15 < -5k. 

Now divide both sides by -5. Remember that whenever you multiply or divide by a negative number, you flip the inequality sign:
-15 < -5k
3 > k 

Your answer is k < 3 (which is the same thing as 3 > k). 
Answer Link

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