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Math Help - Help with Linear Equations Please

  1. #1
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    Help with Linear Equations Please

    line one 8x-11y=-26
    line two 4x-13y=2

    (x,y)

    (7,2) are they on line 1, line 2, both or neither?
    (4,-9) on line 1, line 2, both or neither?
    (5,6) line 1, line 2 or neither?
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  2. #2
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    8(7)-11(2) = -26
    56 - 22 = -26
    34 = -26
    false; thus, (7,2) is not in line 1. Do the same for each coordinate.
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  3. #3
    MJ*
    MJ* is offline
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    The simplest way to check whether the poits falll on a line or not is to put the given point (i mean values of x and y cordinates (x,y)) in the given equation;if both the left hand side( imean the equation part to the left of= sign) is equal to righrt hand side, poits lie on the line

    eg
    line one 8x-11y=-26

    (5,6) line 1, line 2 or neither?

    put 8 (5)-11(6)=-26
    40-66=-26
    -26 =-26 yeah true true......so point (5,6) lies on line 1
    try the rest urself
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