Get the answers you need at Westonci.ca, where our expert community is always ready to help with accurate information. Get quick and reliable solutions to your questions from a community of seasoned experts on our user-friendly platform. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

In a month, a family cell phone plan costs a flat rate of $69.99 plus $9.99 for each additional line. Let n equal the number of additional lines. Which expression represents the monthly cost of this plan?