jenifermolinar1 jenifermolinar1
  • 20-01-2015
  • Mathematics
Answered

you have a total of 21 coins , all nickels and dimes. the total value is $1.70. how many nickels and how many dimes do you have?

Answer :

samrawit samrawit
  • 20-01-2015
Equations:
n + d = 21
5n + 10d = 170 cents
----------------------------
Multiply thru the 1st equation by 5:
5n + 5d = 5*21
5n +10d = 170
--------------

Subtract and solve for "d":
5d = 65
d = 13 (# of dimes)
----
n+d = 21
n + 13 = 21
n = 8 (# of nickels)
Answer Link

Other Questions

which value correctly represents the number that is 10 times as great as five hundred eightyone thousandths
What is the surface area of a mini basketball with a circumferenceof 25 and radius of 4
Solve Log5xlog2x9
Use substitution to solve this system of equations 4x5y19 y8x11
is 48 closer to 0 or 1 and why
why did the spanish and portuguese launch voyages of exploration
What is the solution 9x24x235x90
What does Bilbo give to Frodo when Frodo is about to leave Rivendell A a wooden box B the book Bilbo wrote C a shirt of mail D a palantír
A young boy dropped his deck of baseball cards Unwilling to count them again he remembered that when he put them in piles of two there was one card left over Wh
Use brandish in a sentence