giup em voi

  • TB

    khoảng 1 10 năm trước
  • em hien gio hoc lop 7 ..he hoc high school math ma kho qua nen len day nho may anh chi giup.
    1.. find the slope of the line containing the points (2,5) and (4,9)

    2. what us the equation in the stanđar form of the line through (4,1) and (-2,3)

    3. fin an euqation of the line in points slope form that passes through (4,3) and is parallel to the line 3x-y=7



    anh chi nao gioi ve math thi pm cho em voi nhe

  • 4 Beauty

    khoảng 1 10 năm trước
  • A) equation to find the slope of the line is y2-y1/x2-x1

    B) standard form is y=mx+b (find the slope first) m is slope

    C) Confused ??? i think i'm forgetting sumtin Grin

  • TB

    khoảng 1 10 năm trước
  • emday wrote:A) equation to find the slope of the line is y2-y1/x2-x1

    B) standard form is y=mx+b (find the slope first) m is slope

    C) Confused ??? i think i'm forgetting sumtin Grin

    cho em cai step duoc khong

  • 4 Beauty

    khoảng 1 10 năm trước
  • A) 9-2/4-2 = 5/2 is your slope

  • ca_dao_emvatoi

    khoảng 1 10 năm trước
  • 3. 3x - y = 7 ----> y = 3x - 7 (where 3 is the slope, -7 is the x intercept)

    point (4, 3) with slope = 3
    The equations of the line would be y-y1 = m (x - x1) (where (y1,x1) = (4,3)
    i think you can finish this, anyway u should get more study forgive me to say that just want you to be better Grin

  • Tiên

    khoảng 1 10 năm trước
  • cái này wá là dzể luôn .. TT nói giống như cadao .. đọc trong sách là hiểu liền .. nhưng TT help bạn giải ra nhé ..

    1. find slope, m= slope, and point là (2,5) and ( 4,9)

    find m=y2-y1/x2-x1 then we have m=(9-5)/(4-2) =4/2 = 2, so m = 2

    2. standar form of line through (4,1) and (-2, 3)

    first we have to find slope: m=y2-y1/x2-x1, so we have m= (3-1)/(-2-4) = 2/-6 = -1/3 so m = -1/3

    so we put in equation : y=mx + b

    we have x,y, and m, but no b .. so we have to find b, so b = y1-m(x1), then we have b=1 - (-1/3)(4) = 1+ (4/3) = 7/3, so b= 7/3

    so we have equation : y= -1/3x+ 7/3

    test: (4,1) >>> 1= -1/3(4)+7/3 ; 1= -4/3+ 7/3 = 3/3 = 1

    test: (-2,3) >>>> 3= -1/3(-2)+7/3 ; 3=2/3+ 7/3 ; 3=9/3 or 3=3

    3. 3x-y=7 so we have y=3x-7

    to find equation, we need b, so to find b , we have equation for b is :b = y1-m(x1),

    we have m= 3, x=4, and y= 3, so in the equation we have 3-(3)(4) =3-12= -9

    the new equation is y=3x-9 or 3x-y=9

    check: 3=3(4)-9 = 3=12-9 or 3(4) -3 = 12- 3 = 9 .


    chúc bạn may mắn .. :D

  • Tiên

    khoảng 1 10 năm trước
  • emday wrote:A) 9-2/4-2 = 5/2 is your slope
    chỉ sai rồi đó emday .. :D

  • ngaymaituoisang

    khoảng 1 10 năm trước
  • em nó học lớp 7 mà, đương nhiên là bài dễ đối với mấy anh chị lớp lớn hơn rùi, đừng nói vậy mai mốt mấy em hông dám hỏi bài mấy anh chị nữa. Nhưng mấy em cũng đừng có ỉ lại, vậy thôi.


Designed by squallions © 2004 - 2009 maiyeuem.net (MYE). All Rights Reserved.
All posts and comments are owned by the poster. MYE is not responsible or liable for any content its member posted.
Mọi chi tiết, xin liên hệ: contact
Powered by phpBB © 2001, 2002 phpBB Group