What is the vertex of the quadratic y=-2x^2-4x-5

Asap 25 pts + brainliest to right/best answer

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.