Alex has 84 quarters and nickels worth a total of $17.80.

Which equation can be used to find q, the number of quarters Alex has?

0.25q + 0.05(q – 84) = 17.80
0.05q + 0.25(84 – q) = 17.80
0.25(q – 84) + 0.05q = 17.80
0.05(84 – q) + 0.25q = 17.80

Question

Alex has 84 quarters and nickels worth a total of $17.80.

Which equation can be used to find q, the number of quarters Alex has?

0.25q + 0.05(q – 84) = 17.80
0.05q + 0.25(84 – q) = 17.80
0.25(q – 84) + 0.05q = 17.80
0.05(84 – q) + 0.25q = 17.80

jack1 · Answer

heya
so the total NUMBER of coins he has is 84
and the total VALUE of the coins he has is 17.80... 
now each quartes is worth 0.25 ... and each nickel is worth 0.05...with me so far?

jack1 · Answer

so @maann i'm assuming u've done simultaneous equations before... yeah?

jack1 · Answer

...dude... u there?

anonymous · Answer

@Jack1 What's the answer to this one?

jack1 · Answer

sorry, reading, one sec

jack1 · Answer

d?

jack1 · Answer

does that sound right...? its been like 4 months since this was posted

anonymous · Answer

I'll let you know if it's right.

jack1 · Answer

k thanks

jack1 · Answer

where'd u go...?

anonymous · Answer

it'll be a few mins to know the results. Sorry.

jack1 · Answer

kewl