Answer:
No <u>compraron</u> objetos undustriales.
¿Cuánto tiempo (tienes) que practicas las artes marciales?
Tendras que ser un poquito mas especifico. I don't mind helping you
Answer:
"usted" is the more formal way to speak to an adult or someone older than you in Spanish while "tu" can be used when you're speaking to someone like a friend and that you have a chill and laid back connection with.
Explanation: