kadieneff115 kadieneff115 08-05-2020 Mathematics contestada Fitness Fun charges a $100 signup fee plus $15 per month. Weightlifting World charges $30 per month. Which system models this situation? A. y = 15x + 100 y=30x B. y = 30x + 100 y = 15x C. y = 30 y = 100 + 15 D. y = 100x + 15 y = 30x