A logistics company uses the formula ${}15d + 200$ to calculate the total cost of a delivery trip, where $d$ represents the number of deliveries and 200 is a fixed daily insurance fee. What is the mathematical term for a number like 200 whose value always stays the same?

A catering company uses the formula ${}18p + 45$ to calculate the total cost for a party, where $p$ is the number of people and 45 is a fixed delivery fee. In mathematics, a number like 45 whose value always stays the same is known as a(n) ____.

An internet service provider charges a flat monthly infrastructure fee of ${}5.50$ on every customer's bill. True or False: In an algebraic expression representing the total monthly cost, this ${}5.50$ fee is called a constant because its value remains the same regardless of how much data the customer uses.

Defining Mathematical Constants in Professional Contexts

A landscaping company uses the formula ${}45h + 20$ to calculate the total charge for a service, where $h$ is the number of hours worked and 20 is a fixed equipment fee. Match each mathematical term to the part of the formula it describes.