randomahhstuff
randomahhstuff
11-10-2022
Mathematics
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THIS IS FOR A QUIZ HELP
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If 9(x − 9) = −11, then x = ? A. -92/9 B. -20/9 C. -11/9 D. -2/9 E. 70/9
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In a group of 10 students, 7 are 13 years old and 3 are 17 years old. What is the average (arithmetic mean) age of these 10 students?