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Jeanine is twice as old as her brother Marc if the sum of there ages are is 24 then how old is Jeanine

asked Apr 10, 2020

Mathematics
middle-school

1 answer

2 votes

11.7k views

Use the conservation of mass to explain why a rusty nail weighs more than the original nail.

asked Feb 2, 2020

Chemistry
middle-school

1 answer

0 votes

58.5k views

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