SOLUTION: A jar contains 18 coins, all quarters and dimes. If there are q quarters in the jar, find the total value of the coins in dollars.

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Question 554389: A jar contains 18 coins, all quarters and dimes. If there are q quarters in the jar, find the total value of the coins in dollars.
Answer by Maths68(1474) About Me  (Show Source):
You can put this solution on YOUR website!
Quarters = q
Dimes = 18-q
Total Value in cents = 25*q + 10*(18-q)
Total Value in cents = 25q+180-10q
Total Value in cents = 15q+180
Total Value in cents = 15(q+12)
Total value in Dollars = 15(q+12)/100
Total value in Dollars = 3(q+12)/20