8100/6 = 5400/x
cross multiply
8100x = 32400
x = 32400/8100
x = 4......4 years old
1/3 of an hour = 20 minutes
8 hours = 480 minutes
So to find the number of periods we divide 480 by 20. Answer is 24
Answer:
Associative property of addition: a+{b+c=}{a+b}+c
I don’t get it
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