Question

Georgia has only dimes and quarters in a bag. She has a total of 18 coins that are worth $3. How many more dimes than quarters does she have?

Answer 1

let D = the number of dimes
let Q = number of quarters
we know from the problem that the number of coins is 18
so we can safely say that D + Q = 18

Answer 2

yeah.... i got that far then i did .25q + .10d = 3.00 and well.... it doesn't work.

Answer 3

try setting D = 18 - Q and then plug D into ^ equation

Answer 4

i did, i got some odd equation and since it's asking how many, an eqation of any sort cannot be an answer

Answer 5

lets work through it step by step
if I let D = 18-Q and then plug in we get
.25Q + .10(18-Q) = 3.00

Answer 6

then we distribute the .10

so .25Q - 1.80 - .10Q = 3.00

Answer 7

we can then combine like terms

.15Q -1.80 = 3.00

Answer 8

.15q - 4.8*

Answer 9

=*

Answer 10

no wait i made a mistake it should be
.25Q + 1.80 -.10Q = 3.00

so you were right .15Q = 1.2

Answer 11

and once you find a value for Q you can plug that into D + Q = 18 to find D

Answer 12

and then take the difference D - Q to find how many more dimes than quarters there are

Answer 13

myeh -.- i did the same thing and got it wrong, with you i got it right myeh myeh myeh! jubjub! i hate math >.> anyway thanks

Answer 14

np i made a mistake too