Problem 118 of 7
Solve the break-even problem: Cell phone plan X costs 30 dollars plus 0.10 dollars per minute. Cell phone plan Y costs 10 dollars plus 0.20 dollars per minute.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
set competing models equal and interpret.
Hidden until you reveal it.
Context must compare two models equal at break-even or catch-up point.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Write one expression for each competing quantity.
2. Set them equal.
3. Solve and interpret the input and common output.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Solving only one model independently.