A school needs to buy new notebook and desktop computers for its computer lab. The notebook computers cost $150 each, and the desktop computers cost $200 each. How much would it cost to buy 20 notebooks and 11 desktop computers? How much would it cost to buy nn notebooks and dd desktop computers?
Answer
Attempt 2 out of 2

Total cost, 20 notebooks and 11 desktop computers:

Total cost, nn notebooks and dd desktop computers:

Let's calculate the costs step by step.

### 1. Cost for 20 notebooks and 11 desktop computers:

- **Cost of 20 notebooks**:  
  $ 20 \times 150 = 3000 $ dollars

- **Cost of 11 desktop computers**:  
  $ 11 \times 200 = 2200 $ dollars

- **Total cost**:  
  $ 3000 + 2200 = 5200 $ dollars

So, the total cost to buy 20 notebooks and 11 desktop computers is **$5200**.

### 2. Cost for nn notebooks and dd desktop computers:

- **Cost of nn notebooks**:  
  $ 150 \times n $ dollars

- **Cost of dd desktop computers**:  
  $ 200 \times d $ dollars

- **Total cost**:  
  $ 150n + 200d $ dollars

So, the total cost to buy $ n $ notebooks and $ d $ desktop computers is **$ 150n + 200d $ dollars**.

Would you like more details or have any questions?

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Here are some related questions:

1. How many notebooks can be bought with a budget of $3000?
2. If the school decides to buy only desktop computers, how many can they purchase with $5200?
3. What would be the total cost if the school bought 15 notebooks and 8 desktop computers?
4. How much would it cost to buy 25 notebooks and 15 desktop computers?
5. If the school wants to spend exactly $6000, how many notebooks and desktops can they purchase in different combinations?

**Tip:** When dealing with budget problems, always break down the costs of individual items and calculate the total systematically to avoid mistakes.

Learn how to calculate the total cost of notebooks and desktop computers based on given quantities and prices. This problem involves basic arithmetic operations such as multiplication and addition. Suitable for students in Grades 4-6.

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