snailtrail
snailtrail
24-08-2017
Mathematics
contestada
please help! compound inequalities
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mreijepatmat
mreijepatmat
24-08-2017
a) 5k+3 ≤ - 32 → 5k≤ - 32 - 3 →5k≤ -35 and k ≤ -7
{k| -∞ < k≤ -7}
b) -4k + 7 < -29 →→ -4k<-29-7→→- 4k < - 36→→ +4k>+36→→k> +9
{k| 9 > k > +∞}
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