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 2 years ago
1. Vicki has $2.80 in quarters and dimes. The number of dimes is 7 less than the number of quarters. Find the number she has of each kind.
2. A purse containing $3.20 in quarters and dimes has, in all, 20 coins. Find the number of each kind of coin.
 2 years ago
1. Vicki has $2.80 in quarters and dimes. The number of dimes is 7 less than the number of quarters. Find the number she has of each kind. 2. A purse containing $3.20 in quarters and dimes has, in all, 20 coins. Find the number of each kind of coin.

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xokatexo
 2 years ago
Best ResponseYou've already chosen the best response.0can you show the substitution work?

zepdrix
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1348685007820:dw try to solve for Q from here :)

xokatexo
 2 years ago
Best ResponseYou've already chosen the best response.0Q(Q7)=2.80 2Q7Q=2.80 5Q=2.80   5 5 Q=.56

zepdrix
 2 years ago
Best ResponseYou've already chosen the best response.0woops don't get confused by my brackets :C Q+(Q7) = Q+Q7

zepdrix
 2 years ago
Best ResponseYou've already chosen the best response.0oh woops i messed up from the start T.T oh goodness. im sorry bout that.. need to fix that..

kropot72
 2 years ago
Best ResponseYou've already chosen the best response.1The two equations are as follows: 25Q + 10d = 280 d = Q  7

zepdrix
 2 years ago
Best ResponseYou've already chosen the best response.0yah what kropot said, sorry bout that :C

xokatexo
 2 years ago
Best ResponseYou've already chosen the best response.0k got it THANKS @kropot72
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