A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

It takes me 1.5 hours to go to the college and 2 hours to come back. I fmy average speed while going to the college is 2mph faster than my speed while comming back, find my speed while going to the college.

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    S1 = SPEED TO COLLEGE, S2 = SPEED FROM COLLEGE, D = DISTANCE D(S1 + S2) = 1.5 S1 = S2 + 2 D[(S2 + 2) + S2] = 1.5 2(S2) + 2 = 1.5/D UNABLE TO SOLVE WITHOUT THE DISTANCE TO COLLEGE, HOWEVER BY USING THE DERIVATIVE OF 2(S2) + 2 - 1.5D^-1 = 2 + (1.5D)^-2 YOU CAN CALCULATE THE RATE OF CHANGE BETWEEN THE DISTANCE AND SPEED

  2. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    You can calculate average velocity with v = dt. You're given the t1 and t2 as 2 and 1.5 respectively where t1 is the first trip and t2 is the 2nd trip. You're also given your v1 in terms of your v2. When it says v1 is 2 mph faster than v2, it's telling you v1 = v2 +2, right? The distance is the same in each one, so you can leave it as just d. You can then set it up as a series of equations. v1=t1d and v2 = t1d. Use your v1 = v2 + 2 to solve the distance from there. Once you have your distance, it becomes easy to solve for your velocities.

  3. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry, v2 = t2d, not v2 = t1d

  4. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.