Problema Solution
a cell phone company offers its customers two monthly plans. Plan A costs $20 per month plus $0.15 for each minute used. Plan B cost $15 per month plus $0.20 for each minute used. Write an equation to represent each plan, after how many minutes will the plans cost the same?
Answer provided by our tutors
Let 'x' represent the number of minutes, x>=0.
The equation that represents the first plan is: 20 + 0.15x
The equation that represents the second plan is: 15 + 0.20x
The plans cost the same when:
20 + 0.15x = 15 + 0.20x
........
click here to see the equation solved for x
........
x = 100 min
After 100 minutes the plans cost the same.