Can someone help me on this one

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

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost