SOLUTION: Christina makes $9.25 purchase at a bookstore, with a $20.00 bill the gives her the change in dollars and quarters coins. There are 19 coins in all. How many of each kind are ther
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-> SOLUTION: Christina makes $9.25 purchase at a bookstore, with a $20.00 bill the gives her the change in dollars and quarters coins. There are 19 coins in all. How many of each kind are ther
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Question 888195: Christina makes $9.25 purchase at a bookstore, with a $20.00 bill the gives her the change in dollars and quarters coins. There are 19 coins in all. How many of each kind are there? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = number of dollar coins
Let = number of quarters
-------------------------------
(1)
(2) ( in cents )
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(2)
Multiply both sides of (1) by
and subtract (1) from (2)
--------------------------
(2)
(1)
and, since,
(1)
(1)
There are 8 dollar coins
There are 11 quarters
check:
(2)
(2)
(2)
OK
