Dix-sept objets sont sur le stand.

Because French normally hyphenates compound numbers like dix-sept for 17.

A few useful patterns:

• dix-sept = 17
• dix-huit = 18
• vingt-deux = 22

Modern spelling rules strongly favor hyphens in compound numerals, so dix-sept is the standard form.

It is pronounced roughly like deess-set.

A few pronunciation notes:

• In dix-sept, the x sounds like s
• The t in sept is pronounced here
• The whole thing is said smoothly as one number: dix-sept

If you want a rough IPA form, it is /disɛt/.

Because the noun is plural. The sentence says seventeen objects, so French uses the plural form objets.

• singular: un objet = one object
• plural: des objets = objects

After a number greater than one, the noun is normally plural, so dix-sept objets is exactly what you would expect.

No. In normal pronunciation, the final s in objets is silent.

So objets sounds roughly like ob-zhay.

This is very common in French:

• written plural often adds s
• that final s is usually not pronounced

Because the subject is plural: dix-sept objets.

French être changes depending on whether the subject is singular or plural:

• est = is
• sont = are

So:

• L’objet est... = The object is...
• Les objets sont... = The objects are...

Since dix-sept objets is plural, the correct verb is sont.

Here, sur means on or on top of.

So sont sur le stand means the objects are on the stand.

Depending on context, English might sometimes translate this more naturally as:

• on the stand
• on the display
• at the booth

But the basic meaning of sur is still on.

In French, stand is a borrowed word. It usually means something like:

• a booth
• a stall
• an exhibition stand
• a display stand

So it does exist in French, even though it looks English.

In this sentence, it probably refers to some kind of display or booth where objects are placed.

Because stand is a masculine noun in French, so its singular definite article is le.

French articles must agree with the noun:

• le = masculine singular
• la = feminine singular
• les = plural

So:

• le stand
• les stands

Also, French uses articles more often than English does, so le stand is very normal.

Yes. This is very normal French word order:

Dix-sept objets + sont + sur le stand
subject + verb + location

It matches standard English structure quite closely:

• Seventeen objects
  • are
    • on the stand

So this sentence is a good example of straightforward French word order.

Yes, absolutely.

That version means There are seventeen objects on the stand, and it is often very natural in French.

The difference is mainly about focus:

• Dix-sept objets sont sur le stand focuses more on the objects
• Il y a dix-sept objets sur le stand introduces the fact that there are seventeen objects there

Both are grammatical. In everyday speech, il y a is often the more common way to present this kind of information.