Mathematics, 01.03.2021 23:30 wildfire771003

a jeweler wants to mix gold costing $17 per gram with an alloy costing $7 per gram to make a ring weighing 30 grams and costing $390. how much of each metal is needed

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a jeweler wants to mix gold costing $17 per gram with an alloy costing $7 per gram to make a ring we...

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