In the diagram, is a diameter of the circle with center o. if m = 50°, what is m?

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)