Your piggy bank has a total of 46 coins in it; some are dimes and some are quarters. If you have a total of $7.00, how many quarters and how many dimes do you have? (2 points)

Question

erinweeks · Answer

HELP A SISTER OUT [:

anonymous · Answer

do I get 2 points for answering this?

anonymous · Answer

ha just kidding, I think this is a a algebraic substitution problem. Let me just work it out on some paper

erinweeks · Answer

Thank you jarobins your a big help (: !

merchandize · Answer

Let D be the number of dimes, Q be the number of quarters.
Write an equation for the total number of coins.
1.D%2BQ=46
Write an equation for the total value of the coins.
2.10D%2B25Q=700
Multiply eq. 1 by -10 and add to eq. 2,
-10D-10Q%2B10D%2B25Q=-460%2B700

15Q=240
Q=16
Then from eq. 1,
D%2BQ=46
D%2B16=46
D=30
Thirty dimes and sixteen quarters.

anonymous · Answer

awe man. merchandise got me. But I think you got it wrong merch

anonymous · Answer

o nope, i double checked. Nice

merchandize · Answer

i think so its correct...check out

erinweeks · Answer

Nice , one question though whats up with the %?

merchandize · Answer

%2B=+ sign....
is it fine