SOLUTION: Tamara has 12 coins consisting of quarters and dimes. The total value of the coin is is $ 1.80. How many quarters and dimes does she have in her pocket?
Algebra.Com
Question 144857: Tamara has 12 coins consisting of quarters and dimes. The total value of the coin is is $ 1.80. How many quarters and dimes does she have in her pocket?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
Q+D=12 OR Q=12-D
.25Q+.10D=1.80
.25(12-D)+.10D=1.80
3-.25D+.10D=1.80
-.15D=1.80-3
-.15D=-1.20
D=-1.20/-.15
D=8 IS THE NUMBER OF DIMES.
Q+8=12
Q=12-8
Q=4 IS THE NUMBER OF QUARTERS.
PROOF
.25*4+.10*8=1.80
1+.80=1.80
1.80=1.80
RELATED QUESTIONS
tom has 80 coins consisting of dimes and quarters. if the total value of his coins is... (answered by ewatrrr)
mark has 42 coins consisting of dimes and quarters. the total value of his coins is $6.... (answered by lynnlo)
A coin bank containing only dimes and quarters has 12 more dimes than quarters. The total (answered by ewatrrr)
a coin jar has 50coins consisting of nickels, dimes, and quarters. The total value of the (answered by josmiceli)
Max has 14 coins consisting of nickels, dimes, and quarters. The total value of the coins (answered by josgarithmetic)
Jake has 205 coins consisting of nickels, dimes, and quarters. If the total value of the... (answered by drj)
A coin collection has 18 coins consisting of quarters and dimes. There are two more dimes (answered by macston)
bob has 60 coins consisting of quarters and dimes. the coins combined value is $9.45. how (answered by Tobiasz)
bob has 60 coins consisting of quarters and dimes. The coins combined value is $9.45.... (answered by mananth)