To find: how many nickels are there?
The number of nickels is 18.
Given: A piggy bank contains $ 2.40 in nickels and dimes. If there are 33 coins in all.
Concept Used:
Solving linear equation in two variables using
Calculation:
Let the number of coins of nickels is
As we know: A nickel is worth 5 ¢ and a dime is worth 10 ¢.
So,
Total number of coins are 33.
Subtract equation (i) from (ii) we get:
In equation (i), substitute
Therefore, Number of nickels are 18 and dimes are 15.
Conclusion:
Number of nickels are 18.
Chapter 4 Solutions
High School Math 2015 Common Core Algebra 2 Student Edition Grades 10/11
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