Chapter 3: Q. 189 (page 352)

Maria spent $$12.50$ at the post office. She bought three times as many $$ 0.41$ stamps as $$ 0.02$ stamps. How many of each did she buy?

Short Answer

Expert verified

The number of $$ 0.41$ stamps are $30$ and the number of $$ 0.02$ stamps are $10$ .

Step by step solution

Step 1. Given Information

Total amount $= $ 12.50$

Cost of first stamp $= $ 0.41$

Cost of second stamp $= $ 0.02$

Step 2. Naming the variables

Let the number of $$ 0.02$ stamps be $x$ .

Maria bought three times as many $$ 0.41$ stamps as $$ 0.02$ stamps.

Therefore, number of $$ 0.41$ stamps $= 3 x$

Step 3. Creating the table

The required table is

Step 4. Solving the equation

Translating into equation we get,

$0.41 (3 x) + 0.02 (x) = 12.50 \Rightarrow 1.23 x + 0.02 x = 12.50 \Rightarrow 1.25 x = 12.50 \Rightarrow x = \frac{12.50}{1.25} \Rightarrow x = 10 ∴ (3 x) = 3 (10) \Rightarrow 3 x = 30$

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Maria spent $\(12.50$ at the post office. She bought three times as many $\) 0.41$ stamps as $$ 0.02$ stamps. How many of each did she buy?

Short Answer

Step by step solution

Step 1. Given Information

Step 2. Naming the variables

Step 3. Creating the table

Step 4. Solving the equation

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Maria spent \(12.50at the post office. She bought three times as many \)0.41 stamps as $0.02 stamps. How many of each did she buy?

Short Answer

Step by step solution

Step 1. Given Information

Step 2. Naming the variables

Step 3. Creating the table

Step 4. Solving the equation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Applied Mathematics

Calculus

Mechanics Maths

Theoretical and Mathematical Physics

Decision Maths

Statistics

Study anywhere. Anytime. Across all devices.

Maria spent $\(12.50$ at the post office. She bought three times as many $\) 0.41$ stamps as $$ 0.02$ stamps. How many of each did she buy?