How old are asteriods from our solar system

Read the sentences and choose the correct categories of the verb ser used in the sentences. marta es mi mamá y es paciente. date and personality characteristics relationship and time origin and date relationship, personality characteristics

Answer the following questions using complete spanish sentences. ¿quién ayuda al doctor? ¿qué tomas para sentirte mejor? ¿tienes fiebre ahorita? *note: this is a practice activity. completing this activity will not only prepare you for future tests and assessments but, more importantly, it will enhance your language ability. this activity will not count towards your grade.

Achemist mixes 4 liters of one acid solution with 10 liters of a 40% solution, resulting in a 30% acid solution. what is the value of x, the acid concentration of the first solution