what is this in interval notation 2x+12>-18

Question

What is this in interval notation

Answer 1

Interval notation uses (), parenthesis, or [], brackets, to represent a solution set, domain etc.

2x+12> -18

 

Solve: 2x+12> -18
           2x > -18 -12,      Subtract 12 from both sides

 x > (-30)/2,       Divide both sides by 2

 x > -15

The solution set in interval notation is, (-15, ∞);

in other words, all real numbers greater than -15.

 

Answer 2

2x + 12 > -18

2x > -30

x > -15

 

In interval notation: (-15,∞)

 

On a number line:

 

<---|----|----(===|===|===|===|===|==>

   -17  -16 -15   -14    -13   -12    -11    -10