Your best bet is to save that as a .png file and open it in a raster editor (GIMP, Photoshop, GetPaint.net). Inkscape will open the .svg container just fine, but it’s designed to work on vectors, and only has limited editing ability for rasters (which the scan will be).
If you don’t have the ability to change it, you can open it Inkscape, and then in the File menu click Export PNG - you’ll then have a .png in the same folder you have the .svg saved in (with a name something like “Exported Image”)
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