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25 April, 23:21

Solve the system by substitution.

Y=-x^2+x-1

y=-x-1

A. (3,-4), (-1,0)

B. (-1,0), (2,-3)

C. (4,-5), (1,-1)

D. (0,-1), (2,-3)

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Answers (1)
  1. 26 April, 01:58
    0
    D

    Step-by-step explanation:

    y = - x^2 + x - 1

    y = - x - 1

    -x-1 = - x^2 + x - 1

    x^2 - 2x = 0

    x (x-2) = 0

    x1 = 0, x2 = 2

    y (0) = 0-1 = - 1

    y (2) = - 2-1 = - 3

    (0, - 1) & (2, - 3)
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