A rental car company charges $0.50 per mile and a flat rate of $30.00 for any type of sedan. If m represents the number of miles driven and C(m) represents the total cost for renting a sedan, what is

A rental car company charges $0.50 per mile and a flat rate of $30.00 for any type of sedan. If m represents the number of miles driven and C(m) represents the total cost for renting a sedan, what is the linear equation that represents a cost of $130?