If \(\begin{vmatrix} 5 & 3 \\ x & 2 \end{vmatrix}\) = \(\begin{vmatrix} 3 & 5 \\ 4 & 5 \end{vmatrix}\), find the value of x

Given that I₃ is a unit matrix of order 3, find |I₃|

Calculate the volume of a cuboid of length 0.76cm, breadth 2.6cm and height 0.82cm.

The gradient of the straight line joining the points P(5, -7) and Q(-2, -3) is