A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
A collection of 30 coins worth $5.50 consists of nickels, dimes, and quarters. There are twice as many dimes as nickels. How many quarters are there?
anonymous
 5 years ago
A collection of 30 coins worth $5.50 consists of nickels, dimes, and quarters. There are twice as many dimes as nickels. How many quarters are there?

This Question is Closed

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0Q + D + N = 30 there are more dimes than nickels D=2N $5.50 = 550 cents each Q is worth 25 cents, D 10 cents, N 5 cents > 25Q+10D+5N = 550 solve using substitution sub 2N for D in top equation Q +2N +N = 30 Q+3N = 30 3N = 30Q N = 10(1/3)Q sub this in for N >25Q +10(2*(10(1/3)Q))+5(10(1/3)Q) = 550 distribute and add like terms (50/3)Q +250 = 550 Q = (550250)*(3/50) Q = 90/5 = 18

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0your welcome, follow those steps for any similar problems
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.