SOLUTION: [ a jar contains 55 quarters and dimes. The total value of coins is $8.50. Find the number of quarters and dimes in the jar. ]

Question 817704: [ a jar contains 55 quarters and dimes. The total value of coins is $8.50. Find the number of quarters and dimes in the jar. ]
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
25q + 10d = 850
q + d = 55
q = 55 - d
---
25q + 10d = 850
25(55 - d) + 10d = 850
1375 - 25d + 10d = 850
15d = 525
---
d = 35
q = 20
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
RELATED QUESTIONS
A jar contains 55 quarters and dimes. The total value of the coins is $8.50. Find the... (answered by partha_ban)

A jar contains 18 coins, all quarters and dimes. If there are q quarters in the jar, find (answered by Maths68)

An old jar of dimes and quarters contains 200 coins total, and the value of all the coins (answered by fractalier)

An old jar of dimes and quarters contains 200 coins total, and the value of all the coins (answered by ewatrrr)

Nikki has a total of 31 coins in a jar of only dimes and quarters. The total value of the (answered by Boreal)

An old jar of dimes and quarters contains 200 coins total, and the value of all the coins (answered by KMST)

An old jar of dimes and quarters contains 200 coins total, and the value of all the coins (answered by addingup)

An old jar of dimes and quarters contains 200 coins total, and the value of all the coins (answered by ikleyn)

An old jar of dimes and quarters contains 200 coins total, and the value of all the coins (answered by Alan3354,greenestamps)