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favorite social networking sites among your classmate.​

Sagot :

Answer:

Tik tok

Step-by-step explanation:

Mathematics (from Greek: μάθημα, máthēma, 'knowledge, study, learning') includes the study of such topics as quantity (number theory), structure (algebra), space (geometry), and change (analysis). ... Practical mathematics has been a human activity from as far back as written records exist..nipe