Question 1177453
**Pizza and Subs**

Let's break down the pizza and subs problem:

**1. Define a variable:**

* Let 'p' be the number of pizzas you need to sell.

**2. Write the inequality:**

* Profit from pizzas: $2.75p
* Profit from subs: $1.45 * 48 = $69.60
* Total profit: $2.75p + $69.60
* We want the total profit to be at least $100, so the inequality is:

  $2.75p + $69.60 ≥ $100

**3. Solve the inequality:**

* Subtract $69.60 from both sides: $2.75p ≥ $30.40
* Divide both sides by $2.75: p ≥ 11.05

Since you can't sell parts of pizzas, you need to sell at least 12 pizzas.

**Answer:** You must sell at least 12 pizzas to have a total profit of at least $100.


**Calling Card**

Now let's solve the calling card problem:

**1. Define a variable:**

* Let 'm' be the number of minutes the call can last.

**2. Write the inequality:**

* Cost of the call: $1.25 + $0.35m
* We want the total cost to stay below $5, so the inequality is:

  $1.25 + $0.35m < $5

**3. Solve the inequality:**

* Subtract $1.25 from both sides: $0.35m < $3.75
* Divide both sides by $0.35: m < 10.71

**Answer:** The call can last for a maximum of 10 minutes to keep the total cost below $5.