Question

a text message plan costs $9 per month plus $0.18 per text. find the monthly cost for x text messages. the monthly cost of x messages is dollars. (use integers or decimals for any numbers in the expression.)

Explanation:

Step1: Identify fixed and variable costs

Fixed cost is $9, variable cost per text is $0.18 for x texts.

Step2: Form cost - expression

The total cost is the sum of fixed and variable costs. So the expression is $9 + 0.18x$.

Answer:

$9 + 0.18x$