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add all three number together and then divide by three (because there's three numbers) 21+6=27, 27+9=36, 36/3=12 12 is the answer.
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∙ 15y ago
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What is the average of 5 7 and 9?
The mean is 7, the median is 7 and the modes are 5, 7 and 9.
What is the answer to 9 over 6 equals 21 over n?
9/6 = 21/n3/2 = 21/n Since 3 x 7 = 21, then n must be 14 (2 x 7) and we have:3/2 = 21/14 or 9/6 = 21/14.
What is the average of 8 9 5 6?
Average = (8 + 9 + 5 + 6)/4 = 7Average = (8 + 9 + 5 + 6)/4 = 7Average = (8 + 9 + 5 + 6)/4 = 7Average = (8 + 9 + 5 + 6)/4 = 7
LCM of 6 9 and 21?
126
What is 6x - 9 21?
6x - 9 = 21 6x = 21 + 9 6x = 28 x = 28/6 Reduce to: x = 14/3
What is the average of 5 9 11 13 19 21?
Add them together and divide by 6.
What is the least common multiple of 6 9 and 21?
The LCM of 6, 9, and 21 is 126
What is 21 times 9 plus 6?
21 times 9 plus 6 is equal to 195.
What is the average of 6 8 and7?
6+8+7= 21 21/3 = 7 The average is 7.
What is the average of 5 7 and 9?
The mean is 7, the median is 7 and the modes are 5, 7 and 9.
What is the GCF of 6 15 21 and 9?
The GCF is 3.
What is the average of 9 13 17 and 21?
The average is 15.
What is the answer to 9 over 6 equals 21 over n?
9/6 = 21/n3/2 = 21/n Since 3 x 7 = 21, then n must be 14 (2 x 7) and we have:3/2 = 21/14 or 9/6 = 21/14.
What is the least common multiple of 9 21 6 and 14?
LCM(9, 6, 21, 14) = 126
What is 17 plus 6 plus 7-9?
Are you trying to say 17 + 6 + (7-9) ? = 21
How does 9 6 13 and 21 equal 24?
9-6 = 3 21-13= 8 8x3 = 24
What is the average of 6 and 9 and 10 and 11?
Average = (6+9+10+11)/4 = 36/4 = 9
