Posted by Miranda on Thursday, May 3, 2012 at 8:40pm.
In Vanessa's coin bank there are 4 times as many quarters as nickels, 2 fewer dimes than nickels, and 15 pennies. The total amount in the bank is $5.80. How many of each coin are in the bank?
A. Assign a variable to the unknown quantity.
B. Write an equation you can use to find the unknown quantity.
C. Solve and check the equation you wrote. Show your work.

Algebra  Reiny, Thursday, May 3, 2012 at 8:51pm
nickels  x
quarters  4x
dimes  x2
5x + 25(4x) + 10(x2) + 15 = 580
solve for x, then sub back into my definitions

Algebra  Miranda, Thursday, May 3, 2012 at 9:19pm
Using that equation it comes up to $5.70 not $5.80..?

Algebra  Reiny, Friday, May 4, 2012 at 12:01am
In that case your question is flawed.
since x must come out to a whole number ....
5x + 25(4x) + 10(x2) + 15 = 580
5x + 100x + 10x  20 + 15 = 580
115x = 585
x = 5.08...
so there is no solution.
Check your typing

Algebra  Miranda, Friday, May 4, 2012 at 12:56am
Thanks. Typing is correct .. Question is flawed. Will let teacher know. Appreciate your help!
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