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Anastasy [175]
3 years ago
5

Help me for number 20 and 21 and also show work

Mathematics
1 answer:
Dmitrij [34]3 years ago
4 0
32.4*0.69=22.149

...

45=3*3*5,  63=3*3*7  The greatest common factor is the product of shared primes of the numbers prime factorization.  In this case 3*3=9 is the product of shared primes so the greatest common factor is 9
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