Cole found BC in ABC his work is shown below identify the first step in which his work shows an error Can anyone help me with this question please.
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For which rational expression is -2 an excluded value of x?

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.