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<em>"Associate with people who are likely to improve you."</em>
D + q = 110......d = 110 - q
0.10d + 0.25q = 20.30
0.10(110 - q) + 0.25q = 20.30
11 - 0.10q + 0.25q = 20.30
-0.10q + 0.25q = 20.30 - 11
0.15q = 9.30
q = 9.30/0.15
q = 62 <==== there are 62 quarters
d = 110 - q
d = 110 - 62
d = 48 <==== there are 48 dimes
Answer: 7
Add up the values to get 4+10 = 14
Then divide that result over 2 to get 14/2 = 7
This is using the midpoint formula.
5/6 = 0.833333 .... (non-terminating)