Solve by elimination x+3y=-4 + y+x=0

Hello darlings! could anyone explain to me what exactly this means? i can't understand exactly what my school is asking of me oof i've read the lesson over and over and i'm still confused. create your own nontraditional artwork. you might choose installation art, environmental art, or use an unconventional medium.

Give me five differences between music as art and music as cultural industry

In a paragraph of no less than 125 words, explain the single most important factor involved in advancing american classical music in the twentieth century.