A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

find b given that: A(4,10) and B(b,7) are 5 units apart. How can i solve it ?

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

    distance formula\[5=\sqrt(4-b)^2+(10-7)^2\] that sqrt should be over the whole right side

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

    then solve for b

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

    b=8 or b=0 there are 2 possibilities.

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

    So it would be 5 = 4-b + 9?

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

    could you show how you got your results?

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

    please cause i have 4 problems like this

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

    the (4-b) is still square and the right side should still be under the sqrt

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

    yeah

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

    \[5=\sqrt((4-b)^2+(10-7)^2)\] \[25=(4-b)^2+9\] subtract 9\[16=(4-b)^2\] take the squareroot, and remember that when taking the squareroot you have to use the negative and positive\[\pm4=4-b\]

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

    can you complete from there? or want me to finish?

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

    finish it please

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

    sorry! im just a better learning seeing it out solved

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

    so you have\[4=4-b \] subtract 4 and multiply by -1 to get rid of the negative \[0=b\] and you also have\[-4=4-b\] subtract 4\[-8=-b\] and multiply by -1 to get rid of the negative \[8=b\]

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

    I don't mind. Everyone learns differently and I'm happy to help.

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

    thank you but i have one more

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

    the question is

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

    A(b,b) is sqrt(18) units from its origin.

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

    find b

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

    the origin is at (0,0) so assuming the b is the same you have\[\sqrt18=\sqrt{(b-0)^2+(b-0)^2}\]

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

    so\[\sqrt{18}=\sqrt{b^2+b^2}\] \[\sqrt{18}=\sqrt{2b^2}\]square both sides \[18=2b^2\]divide by 2 \[9=b^2\]take the square \[\pm3=b\]root

  21. 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.