82.0k views
0 votes
Andrew has a cell phone plan that provides 300 free minutes each month for a flat rate of $19. For any minutes over 300, Andrew is charged $0.39 per minute. Which of the following piecewise functions represents charges based on Andrew's cell phone plan?

2 Answers

1 vote

Answer:

19, x≤ 300

19+.39(x-300), x>300

Explanation:

I just did this quiz

Andrew has a cell phone plan that provides 300 free minutes each month for a flat-example-1
User Anandharshan
by
8.1k points
3 votes

Answer:


f(x)=\left\{\begin{array}{l}19,\ \ x\le 300\\ \\19+0.39(x-300),\ \ x>300\end{array}\right.

Explanation:

Andrew has a cell phone plan that provides 300 free minutes each month for a flat rate of $19. For any minutes over 300, Andrew is charged $0.39 per minute.

Let x be the number of minutes Andrew uses per month and f(x) be the charges based on Andrew's cell phone plan.

If
x\le 300, then
f(x)=19.

If
x>300, then first 300 minutes are free and each minute of next (x-300) minutes costs $0.39, therefore


f(x)=19+0.39(x-300).

Hence,


f(x)=\left\{\begin{array}{l}19,\ \ x\le 300\\ \\19+0.39(x-300),\ \ x>300\end{array}\right.

User Gnueghoidune
by
8.7k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories