For how long can an Embraer E195 airplane glide at malfunction?
It's a rather 'clean' plane. Its maximum L/D is, probably, at least 14. (The table shows cruise L/Ds. The L/Dmax is probably much higher in all cases...) Properly handled, and from 35000ft, it might glide for more than 140 kms...

From https://en.wikipedia.org/wiki/Lift-to-drag_ratio :