Question #0bf4a

1 Answer
Oct 30, 2015

Answer:

#t \in [-3,\infty)#.

Explanation:

Divide both terms by #-4#, keeping in mind that dividing both terms of an inequality by a negative number also means to invert the inequality symbol:

#-4t \le 12 -> t \ge -3#.

And this is basically it: we've expressed our inequality as an interval: all the number greater than or equal to #-3#, in interval notation

#t \in [-3,\infty)#.