Question 168877This question is from textbook Intermediate Algebra
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Otis Taylor has a box of coins that he uses when playing poker with his friends. The box currently contains 44 coins, consisting of pennies, dimes, and quarters. The number of pennies is equal to the number of dimes, and the total value is $4.37. How many of each denomination of coin does he have in the box?
This question is from textbook Intermediate Algebra
Found 2 solutions by checkley77, ankor@dixie-net.com:
Answer by checkley77(12844)   (Show Source):
You can put this solution on YOUR website! P=D
P+D+Q=44
D+D+Q=44
2D+Q=44
Q=44-2D
.25Q+.10P+.01D=4.37
.25(44-2D)+.10D+.01D=4.37
11-.50D+.10D+.01D=4.37
-.39D=4.37-11
-.39D=-6.63
D=-6.63/-.39
D=17 NUMBER OF DIMES & PENNIES.
Q=44-2*17
Q=44-34
Q=10 NUMBER OF QUARTERS.
PROOF:
.25*10+.10*17+.01*17=4.37
2.50+1.70+.17=4.37
4.37=4.37
Answer by ankor@dixie-net.com(22740)  (Show Source):
You can put this solution on YOUR website! Otis Taylor has a box of coins that he uses when playing poker with his friends.
The box currently contains 44 coins, consisting of pennies, dimes, and quarters.
The number of pennies is equal to the number of dimes, and the total value is $4.37.
How many of each denomination of coin does he have in the box?
:
p = no. of pennies
d = no. of dimes
q = no. quarters
:
Write an equation for each statement:
:
"The box currently contains 44 coins, consisting of pennies, dimes, and quarters."
p + d + q = 44
:
"The number of pennies is equal to the number of dimes,"
p = d
:
" and the total value is $4.37."
.01p + .10d + .25q = 4.37
:
How many of each denomination of coin does he have in the box?
:
We want to eliminate q here.
Multiply the above equation by 4 and subtract from the total no. of coins eq:
1.0p + 1.0d + 1.0q = 44.00
.04p + .40d + 1.0q = 17.48
--------------------------- subtraction eliminates q
.96p + .60d + 0 = 26.52
:
Remember that p = d, therefore substitute d for p and find d
.96d + .60d + = 26.52
1.56d = 26.52
d = 
d = 17 dimes
and
p = 17 pennies
:
Find Q:
17 + 17 + q = 44
34 + q = 44
q = 44 - 34
q = 10 quarters
:
:
Check solution in the $ equation
.01(17) + .10(17) + .25(10) =
.17 + 1.70 + 2.50 = 4.37
:
:
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