Let me have a try.
1. だこにいきましたか. (
First, I should say"だこ” is wrong, "どこ" is correct)
Where did you go?
2. てんきはどうでしたか.
How was the weather?
3. だれといきましたか.
Who did you go with? (I think)
4. ひこうきのきつぷはいくらでしたか.
How much was the airplane ticket?
I have the answer to the first one.
1. わたしは Washington D.C. にいきました.(
I think it is correct)
I went to Washington D.C. (Again, I am not sure if that is the correct answer)
I have an attempt at the second one.
2. てんきはあついかったです. (
てんきはあつかったです)
The weather was hot. (I am certain that is not correct)
I think maybe it is "The weather has been hot."
I do not know how to say "I went with (someone)" in Japanese. The 3rd one is giving me the most trouble.
3. だれと一緒に行きましたか？（だれといっしょにいきま したか？）
The final question is giving me a bit of a problem. For one, I am not sure if I should convert 500 U.S. dollars to yen, or figure out how to say "500 American dollars" in Japanese.
This is my attempt:
4. ひこうきのきつぷ
（きっぷ）はごまねん
(えん)です.
The Airplane ticket cost 50,000 Yen.
(I think "Yen" is OK.)
Any help would be greatly appreciated.