Question

A collection of quarters and dimes is worth $12.40. There are 67 coins in all.



How many of each coin are there?

Answer 1

q+d=67
.25q+.1d=12.4

Answer 2

So i guess and check?

Answer 3

pretty much
take a number you know is going to be to high for quarters and to low for dimes and then take a number you know will be to low for quarters and to high for dimes and go from there

Answer 4

i.e. 48 quarters and 4 dimes
20 quarters and 74 dimes
the first one has to little coins and the second has to many so now just go with numbers between those

Answer 5

39 quarters 28 dimes?

Answer 6

38 QUARTERS 28 DIMES

Answer 7

29 dimes*

Answer 8

39*.25=9.75
28*.1=2.8
9.75+2.8=12.55
we need 12.40 so almost

Answer 9

38 quarters 29 dimes, right?

Answer 10

yes