The vertices of a triangle are A(-1,1), B(-1,4), and C(-5,4). What are the vertices of the image reflected across the line y=x? *
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O A(-1,-1), B(-1,-4), and C(-5,-4)
O A(1,1), B(1,4), and C(5,4)
O A(1,-1), B(4,-1), and C(4-5)
O A(-1,1), B(-4,1), and C(-4,5)

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

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.

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?