I ride my bike 25 miles in 2 hours to the west. What is my velocity? Use 3 step approach

The sum of the initial and final velocity is divided by 2 to find the average.  

Explanation:

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

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