SOLUTION: Paula has 30 coins in dimes and quarters. Their total value is $4.50. How many coins of each type does she have?

Question 808921: Paula has 30 coins in dimes and quarters. Their total value is $4.50. How many coins of each type does she have?

Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
d + q = 30
q = 30 - d
10d + 25q = 450
---
10d + 25(30 - d) = 450
10d + 750 - 25d = 450
15d = 300
Answer:
d = 20
q = 10
---
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
Paula has 30 coins in dimes and quarters. Their total value is $4.50 How many coins of... (answered by macston)

tina has 20 coins in dimes and quarters. their total value is $3.20. how many coins of... (answered by TimothyLamb)

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

Melissa has 45 coins in dimes and quarters. The total value of the coins is $7.65. How... (answered by josmiceli)

mr.chang has 30 coins consisting of dimes and quarters. the total value of the coins is... (answered by solver91311)

Marcy has a total of 30 dimes and quarters. If the total value of the coins is $5.70, how (answered by lynnlo)

marie has 24 coins in half-dollars and dimes. the total value is $3.60. how many coins... (answered by josmiceli)

Joan has some dimes and quarters. If she has 30 coins worth a total of $4.95, how many of (answered by josmiceli,advanced_Learner)