Y^2+6y-5 how do I do that

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

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

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′?