Posted by **jonathan** on Saturday, December 15, 2007 at 8:36pm.

There are 9 more quarter then dimes.if the total value of the coins is 6.8, how ,any quarters are there?

- math -
**drwls**, Saturday, December 15, 2007 at 8:58pm
Is the total value $6.80?

If so, then let Q be the number of quarters and D be the number of dimes.

You know that

Q -D = 9, and

0.25Q + 0.1D = 6.80

Solving bu substitution,

0.25Q + 0.1(Q-9) = 6.80

0.35Q = 7.70

Q = 22

Now solve for D

- math -
**jonathan**, Saturday, December 15, 2007 at 9:01pm
omg ty u are a super pro

- math -
**drwls**, Saturday, December 15, 2007 at 11:19pm
ty, yw :)

## Answer this Question

## Related Questions

- math - When a child breaks open her piggy bank, she finds a total of 76 coins, ...
- math - There are 60 coins in a box containing only nickels, dimes, and quarters...
- algebra 1 part 2 - Bobbie has 45 coins in dimes and quarters. The total value of...
- algebra - total $3.25 worth of coins nickels, dimes, quarters 2morenickels than ...
- math - A man has 21 coins in his pocket, all of which are dimes and quarters. If...
- Math - Dave has quarters, dimes and nickles in his bank. He has 3 more dimes ...
- math - marcy has a total of 100 dimes and quarters. if the total value of the ...
- College Algebra - A coin jar contains nickels, dimes and quarters. There are 46 ...
- math - 1. Ms.lynch has 21 coins in nickels and dimes. Their total value is $1.65...
- math - Sal keeps quarters, nicles, and dimes in his change jar. He has a total ...