Question

the total value of a collection of dimes and nickels is $2.70. if the total number of coins is 39, how many of each coin is there?

Answer 1

hold on im trying to figure it out

Answer 2

thanks

Answer 3

it is a pain

Answer 4

yeaah lol

Answer 5

\[\large \sf d+n=39 \\\large \sf .1d+.05n=2.7\]

Answer 6

soooo, there is half a nickel??

Answer 7

15 dimes
24 nickels?

Answer 8

thanks man

Answer 9

Woah there, no direct answers. @.Gjallarhorn.

Answer 10

oh ok

Answer 11

lets see.. 15 dimes is 1.50
24 nickels 1.20
addem and you get 2.70

Answer 12

i know im explaining

Answer 13

And the method you used to figure it out?

Answer 14

15 dimes and 24 nickels add up to 39 coins :)

Answer 15

That isn't a method, my friend :)

Answer 16

i just used guess and eliminate

Answer 17

and i got the answer and i explained why that was the answer by adding the values

Answer 18

And that's the problem. We're here to help the asker UNDERSTAND, which your method doesn't do. Your method doesn't work on anything but things like this. With such a small margin of answers, it's easy to guess around and get the answer.

Answer 19

I mean, have you ever had a teacher tell you, "Guess around till you get the answer"? /:

Answer 20

Number of dimes: x
Number of nickels: (39-x)
10x + 5(39-x) = 270 (cents makes sense)
5x = 75
x = 15, the number of dimes. 24 Nickels
checking.... 10*15+5*24 = 270cents or $2.70
THERE YA GO @bearclaw
heres the source
http://www.algebra.com/algebra/homework/word/coins/Word_Problems_With_Coins.faq.question.879243.html
so your final answer is 15 dimes and 24 nickels, bearclaw.
Have a nice day! :)