find the ratio in which the point (3,y) divides the line joining the point (9,8) and (-4,-6) hence find the value of y ​

Question

find the ratio in which the point (3,y) divides the line joining the point (9,8) and (-4,-6) hence find the value of y
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Hồng Cúc 4 years 2021-09-05T09:35:57+00:00 1 Answers 11 views 0

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  1. trucchi
    0
    2021-09-05T09:37:02+00:00
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    Answer:

    m1:m2 = 6:7

    y = 7 (Approx.)

    Step-by-step explanation:

    Given:

    Dividing point (3, y)

    Two points (9 , 8) , (-4 , 6)

    Find:

    Ratio

    Value of y

    Computation:

    X = [(m1)(x2) + (m2)(x1)] / [m1 + m2]

    3 = [(m1)(-4) + (m2)(9)] / [m1 + m2]

    3m1 + 3m2 = -4m1 + 9m2

    7m1 = 6m2

    m1 / m2 = 6 / 7

    m1:m2 = 6:7

    Y = [(m1)(y2) + (m2)(y1)] / [m1 + m2]

    y = [(6)(6) + (7)(8)] / [6 + 7]

    y = [36 + 56] / 13

    y = 92 / 13

    y = 7.07

    y = 7 (Approx.)

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )