Evaluate the following: ` |[1,5,7],[6,7,2],[1,2,3]| `

Evaluate the following: |1/2, 1/5],[1/2, 1/7|

Evaluate the following : [[1,2,-3],[-2,1,7]] [[2,3,1],[5,4,2],[1,6,3]]

Evaluate the following: 6(-4)-2[(-7+5)+(-3)-5]

Find the values of following determinants. (1) |[-1,7],[2,4]| (2) |[5,3],[-7,0]| (3) |[7/3,5/3],[3/2,1/2]|

Find the modal item of the following set of numbers: 2,5,7,3,7,3,2,7,7,5

Find the minors and cofactors of the elements of the following determinants: abs([2,-3,5],[6,0,4],[1,5,-7])

Find the value of x in the following: 1 2/3-:2/7xx x/7=1 1/4xx2/3-:1/6

Find the value of x, if |[(3+x), 5, 2],[1, (7+x), 6], [2, 5, (3+x)]| = 0

Find the mode for the following series: 7.57.3,7.2,7.2,7.4,7.7,7.7,7.5,7.3,7.2,7.6,7.2