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Question 2 A. Write 2x' +8x +13 in the form a (x+ h) + k where a, h and k are constants. B. Sketch the graph of f (x) = 2x2 +8x+13. Write the coordinates of the: i. y-intercept ii. minimum point C. A ray OC stands on a line AOB. Determine the value of x, if ZCOA = 2x-3' and ZCOB = 3x +8' . Hence determine the measure of ZCOA. D. The four angles of a quadrilateral are in the ratio 1:5:6:8. Determine the measure of the angles. E. In the rectangle WXYZ, angle XOY = 570. Determine the angles labelled 1, 2 and 3. F. The diagram below, not drawn to scale, shows a circle with centre O. The points A, B, C and D lie on the circumference of the circle. Angle BAD = 70, angle BOD = x" and angle BCD = yo. Calculate, giving reasons for your answer, the value of x and y