Which expression can be used?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

In which form is the following function written? y = - 2(x – 3)(x + 5)

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?