Elias and niko are polishing the silver at the heritage museum. elias could polish all the silver himself in 40 minutes. that task would take niko 50 minutes to complete alone. which table is filled in correctly and could be used to determine how long it would take if elias and niko polished the silver together?

We let x be the number of hours both could the job together.

The fraction of the job done by Elias is

x/40

The fraction of the job done by Niko is

x/50

Together they would be able to finish the job

x/40 + x50 = 1

x = 1 / (1/40 + 1/50)

x = 22.22 min

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should be the first table

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whats the question?

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