A geologist had two rocks on a scale that weighed 2 1/2 lbs together. Rock A was 1/7 of the total weight. How much did Rock A weigh?

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asked Sep 28, 2018 15.2k views

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Stefan Vukovic · Answer 1 · 2018-10-04T03:47:23+0000

the total weight is 2 1/2 lbs

Rock A is 1/7 of the total weight....so it is 1/7 of 2 1/2 lbs..." of " means multiply

1/7 * 2 1/2 =
1/7 * 5/2 =
5/14 lbs <==

A geologist had two rocks on a scale that weighed 2 1/2 lbs together. Rock A was 1/7 of the total weight. How much did Rock A weigh?

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