For questions 30-34 consider the following: The relationship between displacement, s, velocity, v and acceleration, a of a piston is given by s+2v+2a=4 4a+3s - v=25 2v+3s-a=-4 Using the inverse of a matrix method determine s, v and a. 30. The coefficient matrix A is given by The determinant of A is 31. (-7 15 9 32. If the cofactor matrix is 6 -7 4 then the Adjoint matrix is 10 2 -7 a b c 33. If A-1= d e f, then the value of f is (8 hi 34. a

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