Homework Help: math

Posted by Cathy on Tuesday, October 13, 2009 at 11:46pm.

How would you solve this problem??

A piggy bank contains only nickels and dimes. In all there are 42 coins with a total value of $3.85. How many nickels are in the piggy bank??

math - Jim, Tuesday, October 13, 2009 at 11:52pm
two equations
: n+d=42
.05n+.10d=3.85 or 5n+10d=385
math - Cathy, Tuesday, October 13, 2009 at 11:59pm
Sorry forgot to post the answers, which one would it be??
And can you show how you solved it??

A-3
B-7
C-17
D-35

Thanks
math - Cathy, Wednesday, October 14, 2009 at 12:43am
Ok I got it. Its process of elimination. So it would be B-7.

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