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If the straight lines y=4-3x, ay=x+10, 2...

If the straight lines `y=4-3x, ay=x+10, 2y+bx+9=0` represent the three consecutive sides of a rectangle then ab =

A

18

B

-3

C

`1//2`

D

`-1//3`

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Knowledge Check

  • If the lines y=4-3x,ay=x+10, 2y+bx+9=0 form three sides of the rectangle in order and the fourth side passes through (1, -2) then its equation is

    A
    `x-3y-7=0`
    B
    `x-3y+7=0`
    C
    `x+3y-7=0`
    D
    none

  • The straight lines x+3y-4=0, x+y -4 = 0 and 3x+y-4=0

    A
    form an isosceles triangle
    B
    are concurrent
    C
    form an equilateral triangle
    D
    form a right angled isoceles triangle

  • If the lines 3x+y+2=0, 2x-y+3=0, 2x+ay-6=0 are concurrent then a =

    A
    2
    B
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    C
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