Answer:
umm dude you put this in Spanish not math
Answer:
Es cierto.
(Aunque normalmente, las tildes se usan para dar sentido y acentuación a la palabra/frase que se está leyendo)
Los pardos eran (muy) pobres como los mestizos durante la colonización
Venga a nuestra casa is used for someone who should respect or who is elderly so this would be the right choice.
Ven a nuestra casa would be used to refer to maybe your close friends or people you can be casual with :)