81/4 ÷d= 2/11 give me the answer in fraction form

Does the point (1, sqrt 7) lie on circle shown.

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.

Write the expression 7x^3-28xy^2 as the product of 3 factors