Total Points: 100 Unit III Test 14. Solve "algebraically" for x given v5x + 11 - x -1 = 0. Show your work (you can check your answer(s) with a graphing calculator). (6 points) 15. Find the equation of variation where y varies directly as the square of x and indirectly as the square root of z and where y = 4.0 when x = 2.0 and z = 7.0. Express final answer to three (3) decimal place accuracy (5 points) 16. Given f(x) = x2 + 2x - 5 and g(x) = 2x -1, find the function (fog) (x). Combine any like terms, simplify if possible. (5 points) 17. Find the center and radius of the following circle by completing the square: x2 + y2 + 8x - 2y - 8 = 0. (5 points) Center (ordered pair): Radius