Looking for help to determine average voltage and rms for attached waveform where

Von = 8 V
Voff = 71 V
Ton = 24 mS

 

It's difficult to discern anything that picture is depicting due to terrible lighting. Perhaps you could supply a better picture?

Austin

 

To find RMS, use following formula

Here your f(t) is ramp...and you can calculate it from the figure provided.

remember you have dc component in there...