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levacccp [35]
3 years ago
13

What are the first three common multiples of 9 and 21?

Mathematics
2 answers:
PolarNik [594]3 years ago
7 0
Find first common multiplule
factor them
9=3*3
21=3*7

lcm=3*3*7=63

63 times 2=126
63 times 3=189


the first common multipules are 63,126,189
Digiron [165]3 years ago
5 0
36, 72, and 108. Pretty sure!
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The ratio of boys to girls at a school is 9 to 11. If 400 students attend the school, how many are girls?
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3 years ago
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Jon invests $4,100 into an account that pays 5 percent simple interest each year.what is the total balance in the account after
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% Interest = 5%
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3 years ago
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andreyandreev [35.5K]

Answer:

Option b is correct

\{x | x \neq \pm 7, x\neq 0\}.

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