tim is choosing between two cell phone plans that same amount of free minutes. Cingular plane charges 39.99 per month with additional minutes costing 0.45. Verizon plan cost 44.99 with minutes at 0.40 . How many additional minutes a, will it take for thw two plans to cost the same

Answer:100 minutesStep-by-step explanation:Letx ----> the number of minutesy ----> the total cost of the planwe know thatCingular Plan[tex]y=0.45x+39.99[/tex] -----> equation AVerizon Plan[tex]y=0.40x+44.99[/tex] -----> equation BTo find out how many additional minutes will it take for the two plans to cost the sameSolve the system of equations A and BSolve by graphingRemember that the solution is the intersection point both graphsusing a graphing toolThe solution is the point (100,84.99)see the attached figurethereforeFor x=100 minutes The cost for both plans is $84.99