A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

One of the endpoints of the base of a triangle is at P(4, 5). The midpoint of the base is at (1, 1). Erik performed the steps shown to find the coordinates of the other endpoint of the base. Step 1. x1 = 4, y1 = 5, x = 1, y = 1 Step 2. Step 3. Step 4. 2 = 4 + x2, 2 = 5 + y2 Step 5. 0 = 4 + x2 , 0 = 5 + y2 Step 6. x2 = -4, y2 = -5 In which step did Erik first make an error? Answer Step 2, because he used the formula to find the length of a line segment. Step 3, because he substituted the values incorrectly in the formula Step 4, because he multiplied both the equat

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

    does step 4 pr 5 look wronf i cant figure out how t owrite out step 2 and 3

  2. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    how would you determine the midpoint? match that to the ficticious persons method and see what fits

  3. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    or end points or whatever the questions asking ....

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

    step two is the midpoint between two point formula and step three is the same but puting in the numbers

  5. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Midpoint - endpoint given is the distance and direction to the end point: (M-P) add that result to the midpoint to go the same distance and direction further: M+(M-P) = 2M-P for the other end point

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

    so step 4 would be wrong?

  7. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    2M = (2 , 2) - P = (-4,-5) ------------- (-2,-3) is what I get

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

    okay but i have to find out what step is wrong thats what i dont get

  9. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i dont do the ficticious persons steps, so I really cant say wear they messed up at .... and it would help to know what step 2 and 3 actually were

  10. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    maybe a formula?

  11. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\left(\frac{Mx-Px}{2}, \frac{My-Py}{2}\right)\]

  12. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    that doesnt quite jive ....

  13. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[(Mx,My)=\left(\frac{Px+Ex}{2}, \frac{Py+Ey}{2}\right)\] that might seem better

  14. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    M for midpt, P for given Point, and E for other endpt

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

    |dw:1328202827251:dw|

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

    i hope u understand that lol i tried

  17. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    is step 2: x1-x2 ? if so then its not the midpt formula

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

    no it x1 plus x2

  19. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the midpt is an average of 2 points; an average is sum up the points and divide by ...well 2 since htere are only 2 points :)

  20. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    then step 2 looks fine if its addition

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

    okay so its 3 4 or 5 lol i hate this thank u for workn with me ot figure it out

  22. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    step 3 is plugging in values and with addition it doesnt matter what goes where since 4+5 = 5+4

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

    okay sooo three is wrong im confused

  24. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    3 is fine

  25. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    4 is fine, sicne 2*1 = 2 in both accounts

  26. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    there is no reason for making step 5 zero out

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

    okay :) lol thank u wait so if we are doing addition we shouldnt do subtraction right

  28. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    well, if we add, then subtracting is really not a good idea unless you subtract the right value :) 4+5 = 4--5

  29. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    rides here, good luck :)

  30. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    my bet is step 5 tho

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

    thank u soo much

  32. 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.