Problema Solution
Kelsey has a collection of 40 coins, consisting of dimes and quarters, worth $7.60. How many coins of each kind does she have?
Answer provided by our tutors
let 'x' represent the number of dimes, then '40-x' represents the number of quarters and we have:
7.60 = 0.10x + 0.25(40-x)
solving for 'x' we have x=16
40-16 = 24
she has 16 dimes and 24 quarters