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18 December, 11:49

The height of an arch is modeled by the equation y=-x^2-6x+16. Which of the following gives the width of the arch at its base?

the y-coordinate of the vertex

double the x-coordinate of the vertex

the y-intercept of the equation

the difference between the zeroes

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  1. 18 December, 15:43
    0
    The center of the arch is units

    from the roots, so

    and

    so, the x-coordinate of the arch's center is

    and

    The peak of the arch is at (-3,16)
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