Udbyderen sender tilbuddet.

In Danish, the definite article is usually added to the end of the noun.

• udbyder = provider

• udbyderen = the provider

• tilbud = offer
• tilbuddet = the offer

So instead of putting the before the noun, Danish often puts a definite ending on the noun itself.

Because Danish nouns have grammatical gender.

• udbyder is a common gender noun, so its definite singular ending is usually -en
• tilbud is a neuter noun, so its definite singular ending is usually -et

That is why you get:

• udbyder → udbyderen
• tilbud → tilbuddet

This is something English speakers have to learn noun by noun, because English does not have this kind of gender system for nouns.

sender is the present tense of at sende (to send).

So:

• at sende = to send
• sender = sends / is sending

In Danish, the present tense usually ends in -r.

Also, Danish verbs do not change depending on the subject the way English verbs sometimes do. So you use the same form with all persons:

• jeg sender
• du sender
• han sender
• vi sender

Yes. This sentence has the basic main-clause word order:

Subject + Verb + Object

• Udbyderen = subject
• sender = verb
• tilbuddet = object

So it works just like:

The provider sends the offer.

This is one of the more straightforward Danish sentence patterns.

The subject is udbyderen, because it is the one doing the action.

The object is tilbuddet, because it is the thing being sent.

So:

• Udbyderen = the one who sends
• sender = the action
• tilbuddet = what is sent

The base noun is tilbud. When the definite ending -et is added, the standard spelling becomes tilbuddet.

So:

• tilbud = offer
• tilbuddet = the offer

This is just the correct written form you need to learn. Danish spelling often preserves forms that are not completely obvious from pronunciation alone.

Yes. The Danish present tense can often correspond to either English simple present or present progressive, depending on context.

So sender can mean:

• sends
• is sending

The exact English translation depends on the situation.

You would use the indefinite articles:

En udbyder sender et tilbud.

Here:

• en udbyder = a provider
• et tilbud = an offer

So compare:

• Udbyderen sender tilbuddet. = the provider sends the offer
• En udbyder sender et tilbud. = a provider sends an offer

In standard Danish, the d in sender is not usually pronounced like a strong English d. It is often a softer Danish sound.

A rough learner-friendly pronunciation is something like:

• sender ≈ SEN-er

But that is only approximate. The real Danish pronunciation is softer and less clearly pronounced than in English.

For beginners, the important point is:

• do not pronounce it like a heavy English d
• listen to native audio if possible, because Danish pronunciation can be quite different from the spelling

Often, yes, but not always.

In a simple sentence like this, Danish uses the attached definite ending:

• udbyderen
• tilbuddet

But when there is an adjective, Danish usually also uses a separate article:

• det gode tilbud = the good offer
• den nye udbyder = the new provider

So the attached definite form is very common, but Danish also has other definite patterns depending on the structure of the noun phrase.