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31. Inverse of the matrix is
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32. The system of equations2x + 4y = 10,5x + 10y = 25 has
no solution
only one solution
only two solutions
infinite solutions
33. For the following set of simulataneous equations:1.5x - 0.5y = 24x + 2y + 3z = 97x+ y + 5z = 10
solution is unique
infinitely many solutions exist
equations are incompatible
finite number of multiple solutions exists
34. If matrix A is m x n and B is nx p, then number of multiplication operations and addition operations needed to calculate the matrix AB, respectively are
mn2p,mpn
mpn,(n-1)
mpn,mpn
mn2p, (m+p)n
35. Determinant of the matrix
is
-76
-28
+28
+72
=5(20-30) - 3(10-18) + 2(5-6)
= -50 + 24 - 2
= -28
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