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7. [-/1 Points] DETAILS LARCOLALG9 7.3.050.MI. MY NOTES ASK YO Use an inverse matrix to solve (if possible) the system of linear equations. (If there is no solution, enter NO SOLUTION.) 18x + 12y = 7 30x + 24y = 13 (x, y ) = Need Help? Watch It Master It Talk to a Tutor 8. [-/1 Points] DETAILS LARCOLALG9 7.3.056.MI. MY NOTES ASK YO Use an inverse matrix to solve (if possible) the system of linear equations. (If there is no solution, enter NO SOLUTION.) 4x - 2y + 32 = 6 2x + 2y + 5z = -12 8x - 5y - 2z = 58 ( x, y, Z ) = Need Help? Watch It Master It Talk to a Tutor11. [-/1 Points] DETAILS LARCOLALG9 7.3.047. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER -24 - 2 Use the inverse matrix -10 3 0 -1 -29 3-2 to solve the system of linear equations. 12 -3 -1 1 X1 - 2X2 - X3 - 2X4 = 3 3x1 - 5X2 - 2X3 3x4 = 10 2x1 - 5X2 - 5X4 = 5 -x1 + 4*2 + 4X3 + 11x4 = -1 (X1, X2, X3, *4) = ( Need Help? Talk to a Tutor 12. [-/1 Points] DETAILS LARCOLALG9 7.1.096.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Use a system of equations to find the quadratic function f(x) = ax2 + bx + c that satisfies the equations. Solve the system using matrices. f(1) = 3, f(2) = 12, f(3) = 25 A(x ) = Need Help? Watch It Master It Talk to a Tutor 13. [-/1 Points] DETAILS LARCOLALG9 7.1.503.XP. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Use a system of equations to find the cubic function f(x) = ax + bx2 + cx + d that satisfies the equations. Solve the system using matrices. f(-1) = 6 (1) = 8 f(2) = 33 f(3) = 98 A ( x ) = Need Help? Watch It Talk to a Tutor 14. [-/3 Points] DETAILS LARCOLALG9 7.1.509.XP.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A small software corporation borrowed $220,000 to expand its software line. Some of the money was borrowed at 9%, some at 10%, and some at 12%. Use a system of equations to determine how much was borrowed at each rate if the annual interest was $23,200 and the amount borrowed at 10% was 21/2 times the amount borrowed at 9%. Solve the system using matrices. amount borrowed at 9% amount borrowed at 10% amount borrowed at 12% Need Help? Watch It Master It Talk to a Tutor