Ihave no clue what the answer is.. can someone it’s due tmrw

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

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is