Someone who's really good at Spanish and has snap I need ur help in like 20 min please respond to this

Necessities papel (i need paper) para _. a. la pantalla b. la impressora c. el teclado d. el altavoz

Choose the word that can not complete the sentence. ir afuera. tengo que hay que tengo ganas de está lloviendo

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