Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

wtoliver

  • one year ago

Choose the point which is a solution to the system of inequalities: 2x – y > 7 5x – y > 2

  • This Question is Closed
  1. xlegendx
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    do you know how to solve it when it's equalities? like 2x - y = 7 5x - y = 2

  2. Directrix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @wtoliver Options from which to select? Please add, if so.

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

    Yea, I know how to solve for Y and X I'm just confused how to choose the points. And sorry for not putting them. (–2, –5) (–2, 5) (2, –5) (2, 5)

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

    |dw:1361366236438:dw|

  5. viniterranova
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    For a better draw you can use geogebra

  6. viniterranova
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Here is a better graphich. The region between the two lines must have the answers for the system.

    1 Attachment
  7. Directrix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @wtoliver 2x – y > 7 5x – y > 2 ----------- Test each of the points. If (–2, –5) is a solution, then it has to satisfy both inequalities.

  8. Directrix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    2x – y > 7 Test Point (-2,-5) 2(-2) - (-5) > 7 ----> ? -4 + 5 > 7 -->? 1 > 7 --> No So, the point (-2,-5) is not a solution. No need to test the second inequality because the point does not satisfy the first inequality.

  9. Directrix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Next, look at the second point (-2,5). Note: y = 5 and x = -2. lst inequality to check 2x – y > 7 Point to test (-2,5) Is 2(-2) - 5 > 7 Is -4 - 5 > 7 Is -9> 7 No. Go to next point to test and contine.

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

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.