Question

each month, a phone company charges $20 for 500 minutes of talk time plus $0.45 for each additional minute. unlimited texting costs $20 more. write an expression to show the cost of a talk - and - texting plan for one month, given x minutes over 500.

Explanation:

Step1: Set base cost

Base talk + texting cost: $20 + $30 = \$50

Step2: Add overage cost

Overage cost: $0.45x$ for $x$ minutes over 500

Step3: Combine total cost

Total cost = $50 + 0.45x$

Answer:

$\boldsymbol{50 + 0.45x}$