Die instapkaart en besprekingsbevestiging wys die vlugnommer.

The first die belongs only to instapkaart:

• die instapkaart = the boarding pass
• besprekingsbevestiging = booking confirmation / reservation confirmation

So the subject is:

• die instapkaart en besprekingsbevestiging = the boarding pass and booking confirmation

The second die is for the object:

• die vlugnommer = the flight number

Afrikaans uses die as the definite article for all genders and for both singular and plural. So unlike English, there is no separate the form to worry about.

In Afrikaans, verbs usually do not change form to agree with the subject in the present tense the way English sometimes does.

So:

• Ek wys
• Jy wys
• Hy wys
• Ons wys
• Die instapkaart wys
• Die instapkaart en besprekingsbevestiging wys

The verb stays wys.

This is different from English, where you compare:

• the document shows
• the documents show

Afrikaans does not make that kind of change here.

Afrikaans, like Dutch and German, very often writes compound nouns as one word.

So:

• instap = boarding / getting on
• kaart = card / ticket

Together:

• instapkaart = boarding pass / boarding card

This is completely normal in Afrikaans. English often writes these expressions as two words, but Afrikaans prefers a single compound noun.

Other examples:

• vlugnommer = flight number
• treinstasie = train station
• handbagasie = hand luggage

This is another compound noun:

• bespreking = booking / reservation
• bevestiging = confirmation

Together they form:

• besprekingsbevestiging = booking confirmation

The -s- is a linking sound/letter that often appears in Afrikaans compounds. It does not mean possession in the same way English 's does. It is just part of how many compounds are formed.

So you can think of it as:

• bespreking + bevestiging → besprekingsbevestiging

This kind of linking element is very common and usually just has to be learned as part of the word.

Because the sentence is talking about the flight number as a single piece of information.

Even though there are two documents, they both show the same flight number. So singular makes sense:

• Die instapkaart en besprekingsbevestiging wys die vlugnommer. = The boarding pass and booking confirmation show the flight number.

If you were talking about several different flight numbers, then you could use the plural:

• die vlugnommers = the flight numbers

So this is a meaning choice, not a grammar mistake.

The sentence follows the normal Afrikaans main-clause pattern:

• Subject
  • Verb
    • Object

Here that is:

• Die instapkaart en besprekingsbevestiging = subject
• wys = verb
• die vlugnommer = object

So:

• Die instapkaart en besprekingsbevestiging wys die vlugnommer.

This is very similar to standard English word order.

No. Afrikaans is much simpler here.

Afrikaans uses:

• die for the
• 'n for a/an

There is no grammatical gender to memorize for articles in normal modern Afrikaans usage.

So:

• die instapkaart
• die bevestiging
• die vlugnommer

All use die, regardless of the noun.

Yes:

• Die = the
• instapkaart = boarding pass / boarding card
• en = and
• besprekingsbevestiging = booking confirmation / reservation confirmation
• wys = shows / show
• die = the
• vlugnommer = flight number

A very literal structure would be:

• The boarding pass and booking confirmation show the flight number.

Yes, in this sentence wys is the natural verb for show.

So:

• Die skerm wys die tyd. = The screen shows the time.
• Die kaart wys die roete. = The map shows the route.
• Die instapkaart wys die vlugnommer. = The boarding pass shows the flight number.

Depending on context, wys can also mean point out or indicate, but show is the best match here.

A rough English-friendly guide:

• die ≈ dee
• instapkaart ≈ IN-stahp-kaart
• en ≈ en or a quick uhn
• besprekingsbevestiging ≈ buh-SPREE-kings-buh-FES-tuh-gung
• wys ≈ a bit like vace with an Afrikaans v/w sound; learners often approximate it as vace or wace
• vlugnommer ≈ flukh-nom-er

A few useful pronunciation notes:

• w in Afrikaans is often more like an English v
• g is usually a throaty sound, not a hard English g
• y in wys is not pronounced like English y in yes

If you are learning pronunciation, it helps to hear native audio, because some Afrikaans sounds do not match English very closely.