I may awnser a bit late but there's still hope !
Awnser:
1) Bienvenue à Aix-en-Provence
2) Il est de Washington, la capitale des États-Unis.
3) Voici 45 centimes. Bonne journée !
4) J'ai cours de sciences politiques.
5) David est un étudiant américain.
(And I'm sorry I cannot read the second page, and we probably miss informations for what I managed to read, do you have another document ? And by the way I feel you, french is really hard, from a french)
Step-by-step explanation:
1) The first sentence says "Welcome at Aix-en-Provence" "Welcome" is "Bienvenue" in french and "at" is "à" (but be careful, "à" is not necessarily "at")
2) "He's from Washington, the capital of the United States." (the) capital becomes -> (la) capitale.
3) "Here, 45 cents. Have a good day !" in this context "Here" becomes "Voici" because he's giving something, but you can use it to show something.
4) "I have a political sciences class" "Have" conjugated 1st person singular in french is always "J'ai" J' being Je but since it's followed by a vowel you put an apostrophe to not have a hard time pronouncing 2 following vowels.
5) "David is an american student." The verb be 3rd person of singular is always "est".
Hope I helped you, have a good night !