Answer
$1 \lt 2x+3$ and $2x+3 \lt 9$
Work Step by Step
The inequality $1 \lt 2x +3 \lt 9$ is a compound inequality because it is the combination of the following inequalities:
$1 \lt 2x+3$ and $2x+3 \lt 9$
The word in between the two inequalities is "and". We know that it is not "or" because "or" inequalities can not be combined into one equation.
