The Newtown Telephone Company advertises that if you use their 10-10 service, you will always pay only 9c per minute, no matte
r where you call within the country. Its major rival, Tryus Telephone Company, charges only 3c per minute, but you must pay a 36 c "connection fee" per call. Create a cost equation for each telephone company where y is the total cost for each phone call (in cents), and x is the number of minutes the phone call lasts. Write a system of equations.