9. The cost in dollars for producing > items is given by the following graph. Using the graph, estimate the maximum cost of producing x items. 10 20 a) $22 b) $12 $30 d) $24 10. Find the equation of the line that contains (-2, -8) and has a slope of m = 5 . a) y=-5x+2 by = - 5x -2 c) y = 5x+ 2 d) y = 5x -2 11. Find the equation of the line that passes through (-2,5) and is parallel to 2x+3y =8. a) 2x+3y=11 b ) - 3x+2y=16 c) 2x+ 3y =4 d) - 2xty=9 12. The general form of a circle is x2 + y2 -10x-8y+32=0 . Write the equation of the circle in standard form. a ) (x- 5 ) + ( 1 - 4 ) = 9 b ) ( x* + 5 ) ? + ( 1 + 4 ) ? = 9 c ) ( x - 5 ) + ( 1 - 4 ) =3 d) ( x+ 5) + (1-4)? =34. Let = = at b/ be a complex number, then a - the conjugate of : find the value of 2:2. Express your answer in standard form. If z - 4 - 31. find the d) -7-241 a) 25 c) 16+151 b) 251 5. If f (x) =4-9x and g(x) = -7x+9, find (f+g)(x) d) -2x +13 a) -7x+4 b) -16x +13 C) -3.x 6. Graph f (x) =x - 3.x3 + 2 on the interval -1