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MPM1D Ms. Kueh Modelling with Formulas Day 2 Example 1 The Cost of a pen is 3 times the cost of a pencil. The cost of 4 pencils and 3 pens is $9.75. What is the cost of a pencil? Example 2 Aretha has $0.85 in nickels and dimes in her piggy bank. She has 2 more nickels than dimes. How many nickels and dimes does she have? TIPS Practice A box contains 140 dimes and nickels. The total value is $11.15. How many dimes and how many nickels are there? Homework: Handout