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20 October, 19:23

In which quadrant on the coordinate plane is (-a - 3, 2b - 5), if a = - 4 and b = - 5?

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  1. 20 October, 20:19
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    - a - 3 = x

    Plug in - 4 for a

    = - ( - 4) - 3

    = 4 - 3

    = 1

    2b - 5

    Plug in - 5 for b

    = 2 (-5) - 5

    = - 10 - 5

    = - 15

    So (-a - 3, 2b - 5) = (1, - 15)

    Notice 1 is positive and - 15 is negative.

    This means (1,-15) is in the second quadrant.
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