Plot a region plot between two functions

I want to plot the region between the two functions as in the image below:

I tried

RegionPlot[ 11.61 + 3.555 x < y && y < 2.094 + 2.761 x, {x, 0, 20}, {y, 0, 80}]

but I get a blank plot.

Any idea why?

In Desmos this was achieved using

11.61+3.555x<y<2.094+2.761x

Both predicates cannot be satisfied. Have to invert

RegionPlot[11.61 + 3.555 x > y && y > 2.094 + 2.761 x, {x, 0, 20}, {y, 0, 80},
 BoundaryStyle -> Dashed]

I want to plot the region between the two functions …

One more approach:

Plot[{11.61 + 3.555 x, 2.094 + 2.761 x}, {x, 0, 20}, 
 PlotRange -> {0, 80}, AspectRatio -> 1, 
 PlotStyle -> Directive[Dashed, Blue], Filling -> {1 -> {2}}, 
 FillingStyle -> Directive[Blue], 
 GridLines -> {Range[0, 100, 2], Range[0, 100, 5]}]