Bodhi has a collection of 175 dimes and nickels. the collection is worth $13.30. which equation can be used to find n, the number of nickels in the collection?
answer- 0.1(175-n)+0.05n=13.30

N+d=175, so d=175-n

0.05n+0.1d=13.30  now using d found above in this equation yields:

0.05n+0.1(175-n)=13.30

...

1.5(4-g)+1g=5.5

6-1.5g+g=5.5

6-0.5g=5.5

-0.5g=-0.5

g=1

5.5/4=1.375

So your grid should be:

3oz    1.50     4.50

1oz    1.00     1.00

4oz    1.375   5.50