SOLUTION: John has nine dollars in change. He has twice as many quarters as dimes ?? A) how many dimes and quarters dies John have

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Question 940900: John has nine dollars in change. He has twice as many quarters as dimes ??



A) how many dimes and quarters dies John have
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
John has nine dollars in change. He has twice as many quarters as dimes ??
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Is that a question?
Does he have twice as many quarters as dimes? 2 question marks makes me wonder.

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
John has nine dollars in change. He has twice as many quarters as dimes ??
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A) how many dimes and quarters does John have?
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Equations::
Quantity:: q = 2d
Value:::: 10d + 25q = 900 cents
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Substitute for "q" and solve for "d"::
10d + 25(2d) = 900
10d + 50d = 900
60d = 900
d = 15 (# of dimes)
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Solve for "q"::
q = 2d
q = 2*15 = 30 (# of quarters)
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Cheers,
Stan H.
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