SOLUTION: Jada has a total of 21 coins, only dimes and quarters. She has $3.15.how many of each coins does she have?

Question 1026950: Jada has a total of 21 coins, only dimes and quarters. She has $3.15.how many of each coins does she have?

Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
.
D=number of dimes; Q=number of quarters
.
D+Q=21
D=21-Q . Use this to substitute for D below.
.
$0.10(D)+$0.25(Q)=$3.15 . Substitute for D from above.
$0.10(21-Q)+$0.25(Q)=$3.15
$2.10-$0.10Q+$0.25Q=$3.15
$0.15Q=$1.05
Q=7
.
ANSWER 1: She has 7 quarters.
.
D=21-Q=21-7=14
.
ANSWER 2: She has 14 dimes.
.
CHECK:
.
$0.10(D)+$0.25(Q)=$3.15
$0.10(14)+$0.25(7)=$3.15
$1.40+$1.75=$3.15
$3.15=$3.15
.

RELATED QUESTIONS
georgia has only dimes and quartersin her bag. She has a total of 18 coins that are worth (answered by lwsshak3)

Ginger has five more quarters than dimes. She has $5.10 in change. If she has only... (answered by Alan3354)

Barbara has some dimes and quarters. If she has 29 coins worth a total of $3.95, how (answered by fractalier)

Joanne has $16.30 in dimes and quarters. If she has a total of 88 coins, how many of each (answered by Boreal)

sally has only dimes and quarters in her pocket. she has 21 coins all together with a... (answered by addingup,josgarithmetic)

Samantha has 9 coins worth a total of $1.35, which consist only of dimes and quarters.... (answered by ankor@dixie-net.com)

Sara has a collection of nickels, dimes and quarters worth $30.75. she has 15 more dimes... (answered by mananth)

Jenny has a total of 21 dimes and quarters in her piggy bank. If the coins are worth... (answered by josgarithmetic)

liviana has $ 2.20 in coins in her change purse. if there is a total of 15 coins how... (answered by josmiceli)