Chapter 3: Q, 169 (page 351)

Harrison has $ $9.30$ in 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 $30$ and dimes are $90 .$

Step by step solution

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 $3 x$

Step 2. Solution of the equation

Now, According to the question,

$0.01 x + 0.10 (3 x) = 9.30 0.01 x + 0.30 x = 9.30 0.31 x = 9.30 x = 30 T h e r e f o r e, 3 x = 3 \times 30 = 90$

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Harrison has $ $9.30$ in 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

Step by step solution

Step 1. Given Information

Step 2. Solution of the equation

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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

Step by step solution

Step 1. Given Information

Step 2. Solution of the equation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Discrete Mathematics

Applied Mathematics

Pure Maths

Logic and Functions

Theoretical and Mathematical Physics

Geometry

Study anywhere. Anytime. Across all devices.

Harrison has $ $9.30$ in 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?