What is the missing. angle measure of this isosceles triangle

After being rearranged and simplified, which of the following equations could be solved using the quadratic formula? check all that apply. a. 9% + 3x2 = 14 + x-1 b. -x+ + 4x + 7 = -32-9 c. 5x + 4 = 3x4 - 2 d. 2x2 + x2 + x = 30

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2