Homework Help: algebra/math

Posted by shhtacy on Tuesday, February 17, 2009 at 6:07pm.

Rico's collection of quaters and dimes contains $32.85. There are 171 coins in all How many quarters and how many dimes are in Rico's collection?

i solve these with 2 equation.
would they be:

q + d = 171
25q + 10d = 32.85

help me please.

algebra/math - drwls, Tuesday, February 17, 2009 at 6:33pm
The second equation should be
25q + 10d = 3285, becasue it refers to the number of cents, not dollars

If you substitute 171 - d for q in the second equation, you can solve for d.
algebra/math - shhtacy, Tuesday, February 17, 2009 at 6:45pm
105 quarters
66 dimes

is that right?

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