Answer:
Mi amiga Rosa es inteligente.
Mi compañera de cuarto es perezosa.
María, tú eres muy simpática.
Pablo, tú eres muy divertido.
Me llamo Luis y soy mexicano.
Mi profesora de matemáticas es muy trabajadora.
Mi hermana puede ser muy impaciente y un poco difícil.
Angélica y Miguel son serios.
David y Martín son muy trabajadores.
Gabriel es popular. Leticia es muy popular también.
Explanation:
In Spanish adjectives have genre, and they can be singular or plural. In general, when an adjective is female, it ends with an "a", as in "peresoza" or "trabajadora". When it's male, it ends with an "o", as in "divertido" or "mexicano" (note that in Spanish nationalities aren't written with capital letters). When adjectives accompany a plural noun, they need to be in the plural form. In this case, an "s" should be added at the end of the adjective. For example, "serios".
There are, however, some exceptions when it comes to adjective's genre. For instance, when they end with an "e", they remain the same both for male and female nouns. This is the case of "inteligente". When the adjective ends with "ar", as in "popular", they also remain the same.
Finally, when there is a male and female noun together which need a plural adjective, the form used is the male one. For example: "Angelica y Miguel son muy trabajadores". In this case "trabajadores" is male, but it's correct.
