It all depends on what you expect in terms of quality.

Most flatbed scanners are consistently bad (I've tried a few, even my Epson V700 is quite soft, useless for 35mm). You can expect multi-function scanner/printers to be even worse.

All of the manufacturers advertise resolutions that are far from what they can actually deliver. Epson's supposed 6400dpi is really close to 2400

On top of that, scanning is painfully slow if you use the highest resolution settings.

The dynamic range of flatbed scanners is not great either. You can expect blotchy shadows and clipped highlights, specially if you scan Kodachrome film, that has a much higher density.

If you were to spend a bit more money on a dedicated film scanner like the Plustek OpticFilm 8200i you can get a very decent scan with proper dynamic range and a much better resolution (about 3200 dpi, still not the 7200dpi advertised by the manufacturer, but decent enough to get the resolution of the original film). Be advised that scanning in such a device will be very slow, about 9 minutes in the highest quality settings.

I would spend that money on a good setup to re-photograph the slides. Get a 100mm macro lens. Use on a camera that can shoot RAW at whatever megapixels you need. Get also a copy stand, a decent light box and several cans of compressed air to blow the dust away from the slides.

Take your time to set it up and focus correctly and you will be able to digitize images in a fraction of a second (If you have hundreds of slides you will be able to scan all of them within your lifetime). Tethering the camera to a computer will make things easier. The benefits of this setup is that you will be capturing all of the dynamic range of the film, and you will end up with digitized images in a file with enough bit depth and plenty of information to do color correction and retouching later.

If you find a few stellar photos in your collection, it might be worth scanning those with a professional service. You'll see the difference.