Joe has a ring weighing 15 grams made of an alloy of 20 silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 67 . How many grams of silver should he add?
2 answers
1) Moe earns 20 more than her husband Joe. Together they make 72000 per year. What is Joe’s annual salary
Joe has to add 2.9104 g of silver
1 answer