Is musical ensemble of four singers or instrumental performera​

In music, a quartet or quartette (French: quatuor, German: Quartett, Italian: quartetto, Spanish: cuarteto, Polish: kwartet) is an ensemble of four singers or instrumental performers; or a musical composition for four voices or instruments.

Explanation:

- Consider the second order ODE x + y " – 5xy ' + 5y 3.x2 . For y ( 1 ) = -10 and y ' ( 1 ) = 10 , the unique solution at x -1 is

nope becasue a mosque is a place where muslims pray to god, but the taj mahal was built by (forgive me) someone for his wife. i dont think anyone prays there. also a mosque is for muslims but indians are hindi.