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August 1, 2015

Homework Help: algebra

Posted by ann on Tuesday, February 7, 2012 at 5:16pm.

please check and correct thanks
Problem: solve and check the inequality if possible
|4F+8|< 12
positive: negative:
|4F+8| < 12 |4F + 8| < -12
4F + 8 -8 < 12 - 8 4F +8-8 < -12-8
4F < 4 4F< -20
F < 1 F< -5
solutions 1 and -5 or
-5 < F < 1
check positive ck negative
|4F + 8| < 12 |4F + 8| < -12
4(1) + 8 < 12
4 + 8 < 12 4(-5) + 8 < -12
12 < 12 -20 +8 < -12
-12 < -12

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