## ErinWeeks 3 years ago 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)

1. ErinWeeks

HELP A SISTER OUT [:

2. jarobins

do I get 2 points for answering this?

3. jarobins

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

4. ErinWeeks

Thank you jarobins your a big help (: !

5. merchandize

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.

6. jarobins

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

7. jarobins

o nope, i double checked. Nice

8. merchandize

i think so its correct...check out

9. ErinWeeks

Nice , one question though whats up with the %?

10. merchandize

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