Michael A. answered • 10/11/16

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-15c + 28 > 133

-15c > 133 - 28

-15c > 105

c < -7

**<------------------------**ο-------------------------->

-7

In case it's not clear from the sketch, everything to the left of the point -7 should be shaded. The circle at -7 should be open because it is a "less than" inequality. If it were "less than or equal to," then the circle would be filled in.