Problema Solution
Kevin and Randy Muise have a jar containing 74 coins, all of which are either quarters or nickels. The total value of the coins in the jar is $13.10. How many of each type of coin do they have?
Answer provided by our tutors
let 'x' represent the number of quarters, then '74-x' represents the number of nickels
13.10 = 0.25x + 0.05(74-x)
solving for 'x' we have x=47
74-47 = 27
there were 47 quarters and 27 nickels