Answer
See answers below
Work Step by Step
Given: $9x+4x+11x+7x+5x+4x$
Mean: Add all the expressions and divide by 6 $=\frac{ 9x+4x+11x+7x+5x+4x}{6}=6.67x$
Median: $4x+4x+5x+7x+9x+11x$
then $=\frac{5x+7x}{2}=6x$
Mode: $4x$
Range: The difference between the largest and smallest number: $11x-4x=7x$