4. [2x + Sy = -11 5. [3x - 2y + = = 0 15x - y = 19 Gr + 2y + 32 - -2 6. [ x - 4y - 2- 3 2x - Sy + 2 -0 3x - 4y + 5: - (3x - 3y + 2: - -1 7. Find the equation of the parabola y = ar' + hr + c that passes through the points (0. 6). (-2, 2), and (3. ]). In Exercises 8 and 9, write the partial fraction decomposition for the rational expression. -2r + 2y + 32 - 7 8. 5x - 2 9. Itatx+2 x - y =-5 y + 42 - -1 In Exercises 10 and 11, use matrices to solve the system of equations, if possible. System for 13 10. [2x + y + 22 = 4 11. [2x + 3y + 2 - 10 2x + 2y - 5 2x - 3y - 32 - 22 (2x - y + 6 - 2 (4x - 2y + 3 = -2 12- (4. In) 10- 12. If possible, find (a) A - B, (b) 34. (c) 34 - 28, and (d) AR. 4 (4. 5) (-1. 1). -8 -6 -4 -2 13, Find A ' for A = 1 - 1 0 and use A ' to solve the system at the right. (-1.-5)1 In Exercises 14 and 15, find the determinant of the matrix. Figure for 16 14. - 25 -71 400 - 16. Use determinants to find the area of the parallelogram shown at the right. 17. Use Cramer's Rule to solve (if possible) 2t - 2y - 3 14 4y =-1' 300- 100 18. The flow of traffic (in vehicles per hour) through a network of streets is shown at the right. Solve the system for the traffic flow represented by a, / = 1. 2, 3. 4. and 5. Figure for 18