Please help me I'm behind!!

Which expresions are equivalent to the one below? check all that apply. 5x

Find the solutions for a triangle with a =16, c =12, and b = 63º

Which of the following equations is of the parabola whose vertex is at (2, 3), axis of symmetry parallel to the y-axis and p = 4? a.)y-3 = 1/16 (x-2)^2 b.)y+3 = -1/16 (x+2)^2 c.)x-2 = 1/16 (y-3)^2