A local pizza shop has a membership program for frequent buyers. The membership costs $20 per month and members get a discounted price of $1 per slice of pizza. Benjamin purchased a membership to this pizza shop. How much would Benjamin have to pay the pizza shop if he bought 7 slices of pizza this month? What would be the monthly cost for xx slices of pizza?

To find how much Benjamin would pay this month after purchasing the membership and buying 7 slices of pizza:

1. The cost of the membership is $20 per month.
2. The price per slice for members is $1 per slice.

Now, for 7 slices of pizza:

\[
\text{Total cost} = \text{Membership cost} + \text{Cost of 7 slices}
\]
\[
\text{Total cost} = 20 + (1 \times 7) = 20 + 7 = 27
\]

So, Benjamin would pay **$27** if he bought 7 slices of pizza this month.

### General formula for $ xx $ slices of pizza:

Let $ x $ be the number of slices of pizza. The total monthly cost, $ C(x) $, for $ x $ slices would be:

\[
C(x) = 20 + 1 \times x = 20 + x
\]

Thus, the cost for $ xx $ slices of pizza is $ 20 + xx $ dollars.

Would you like more details on this, or have any questions?

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Here are 5 related questions to expand your understanding:

1. How much would Benjamin pay if he bought 15 slices of pizza in a month?
2. At what point would Benjamin spend more than $50 in a month on pizza?
3. What is the cost for non-members if a slice costs $2.50 per slice without a membership?
4. How much does Benjamin save per slice compared to the non-member price?
5. How would the cost change if the membership price increased by 10%?

**Tip**: Always use general formulas to find flexible solutions that apply to different values!

Learn how to calculate the total monthly cost for Benjamin, who purchased a $20 membership at a local pizza shop and bought 7 slices of pizza. This example covers the formula C(x) = 20 + x, demonstrating how to find the total cost for different numbers of pizza slices. Suitable for Grades 6-8 students.

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