Can someone help me with this

Solve this problem! extra ! 3025/5.5 = a/90.75

Solve the equation: x - 9 = -6 + 5 a. 21 b. 7 c. 14 d. 2

Plz hurry finals a paper cup in the shape of an inverted cone is 8 inches tall and has a radius of 1.5 inches. how much water can the cup hold? use 3.14 for pi. round the answer to the nearest tenth. a) 12.6 cubic in. b) 18.8 cubic in. c) 37.7 cubic in. d) 56.5 cubic in.