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Chapter 3: Q, 169 (page 351)

Harrison has $ 9.30in his coin collection, all in pennies and dimes. The number of dimes is three times the number of pennies. How many coins of each type does he have?

Short Answer

Expert verified

The number of pennies are 30and dimes are90.

Step by step solution

01

Step 1. Given Information

Total amount=$9.30

Let he number of pennies be x

Therefore ,

According to the question,

number of dimes will be 3x

02

Step 2. Solution of the equation 

Now, According to the question,

0.01x+0.10(3x)=9.300.01x+0.30x=9.300.31x=9.30x=30Therefore,3x=3脳30=90

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