SOLUTION: three pieces of 25 cents and two pieces of a cent have a mass of 27 grams. two pieces of 25 cents pieces and six pieces of a cent have a mass of 32 grams. how is the mass of each p
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Question 139008: three pieces of 25 cents and two pieces of a cent have a mass of 27 grams. two pieces of 25 cents pieces and six pieces of a cent have a mass of 32 grams. how is the mass of each pieces
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let x be the mass of a quarter and y be the mass of a penny, so:
Multiply the first equation by -3:
Add the two equations term-by-term:
A quarter (25-cent piece) weighs 7 grams.
A penny (1-cent piece) weighs 3 grams.
Those answers were made up to make the arithmetic come out neatly. A pre-1965 silver quarter weighs 6.25 grams. The copper-nickel quarters minted after 1964 weigh only 5.67 grams. Pennies vary in weight from 2.4 to 3.2 grams.
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