Problema Solution
jack has $4.80 in quarters dimes. he has a total of 30 coins. how many quarters and how many dimes does he have?
Answer provided by our tutors
1 quarter = 25 cents
1 dime = 10 cents
Let
q = the number of quarters, q>=0, q is integer
d = the number of dimes, d>=0, d is integer
Jack has 30 coins totaling $4.80 = 480 cents:
q + d = 30
25q + 10d = 480
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q = 12 quarters
d = 18 dimes
Jack has 12 quarters and 18 dimes.