Why is the x- y- Cartesian coordinate system important to the motion of an object in two dimensions? It measures the speed of the object.

It is used as a frame of reference.

It directly measures the acceleration of an object.

It determines the time the object is in motion.

representative si the final answer! : )

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.