Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

shivraj Group Title

One cell phone plan costs $39.95 per month. The first 500 minutes of usage are free. Each minute thereafter costs $.35. Write a rule that describes the total monthly cost as a function of the number of minutes of usage (over 500 minutes). Then find the number of minutes of usage over 500 minutes for a bill of $69.70?

  • one year ago
  • one year ago

  • This Question is Closed
  1. CalebBeavers Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Let c=cost and m=minutes of usage(over 500 minutes) c=.35m+39.95

    • one year ago
  2. CalebBeavers Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    So to find the number of minutes over 500 for a bill of $69.70, substitute 69.70 into the equation for c and solve for m

    • one year ago
  3. shivraj Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    c = $39.95 + $0.35 e Now to find the number of minutes over 500 in a bill of $69.7 $69.7 = $39.95 + $0.35 e $29.75 = $0.35e $29.75 / $0.35 = e 85 min = e The person talked an extra 85 min over 500 min, or a total of 585 minutes used.

    • one year ago
  4. CalebBeavers Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yep

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.