Write the equation of the parabola that has the vertex at point (1,3) and passes through the point (−1,5).

Match the equivalent expressions. x - 3y + 12 12 - 3y - 2x + x + 2x 3x + 2y - 2x + y + 12 3y + 12 3x + y - 12 4y + 3y + 3x - 6y - 10 - 2 x + 3y + 2x - 3x + 7 + 5 x + 3y + 12 5 + 2y + 7x - 4x + 3y - 17

Evaluate cos2θ for cosθ = square root of 3/2

We just started the introduction into circles and i have no idea how to do this.