una onda se propaga a una velocidad de 5 m sobre segundo la onda tiene una longitud de 20 m calcula el periodo y la frecuencia ​

Does anyone know what my spanish teacher means by this? i need to use plural forms of the verb ser. and she asked me to use a couple of adjectives to describe the boys collectively and then the girls collectively?

Compare your daily life with what life would have been like at chichen itza. in what ways is it similar? in what ways is it different? write your answer in english.

These are the questions and answers select the best translation for the following term or phrase. what did i do? ¿qué hice? select the best translation for the following term or phrase. i take one piece of wood. tomo un trozo de madera. fill in the blank according to the story. en la mesa hay varios trozos de madera