36. Find the x-intercepts of the graph of f (x) = 1 -7 x - 6 a) (17, 0). (-57,0) b ) ( 6 ,0 ) c ) ( - 7,0 ) d) 37. Find the Domain of the composite function (f . g ) (x) given that f (x ) =- and 8(x) =- a) (-00 , 4 ) U ( 4, 00 ) b ) ( - 00 , 0 ) U ( 0 , 00 ) C ) ( - 00 , 0 ) U ( 0 . # ) u (#+00 ) d) (-00, 0) U (0, 4) U (4, 00 ) 38. If the function is defined by f ( x) =- , then f , the inverse function of f , is defined by x+1 f- ( x ) = a) x+1 b ) -1 C ) 1-x d) x x +1 x 39. Solve for x in the equation: 22* +2* -12 =0 a) x= -4, x =3 b ) x = In 3 In 2 c) x=-2, x = N / W d) x=- In 2 In 3 40. Solve the equation: log x + log (x +21) =2 a) x=-25 and x = 4 b) x = 25 and x =-4 C ) x = 25 d) x=441. The half-life of Radium is 1690 years. If 500 grams are present now, how much will be present in 150 years? a) 470.17 grams b) 333.33 grams c) 400.21 grams d) 452.12 grams 42. At a ballgame, one family bought 11 hotdogs and 5 sodas for $25.50. Another family bought 3 hotdogs and 4 sodas for $10.25. What is the cost of a hotdog? a) $1.75 b) $3.00 c) $3.25 d) $1.25 43. Which of the following statements accurately describes the system represented by the augmented matrix? 5 - 21 3 0 - 2 O 0 5 a) The system has one solution. ) The system has no solution b) The system has infinitely many solutions. d) The number of solutions cannot be determined. 44. Solve the system xy = 24 ly - 2x+2=0) a) (-3, -8), (4, 6) b) (-3 ,-6), (4,-8) c ) (- 3, 4 ) d) (-3, 4), (-8,6) 45. Identify the minimum function value: f (x) = 4x2 - 8x +7 a) f(1) b) f (- 1) c ) f (2) d) f(-2 )