Ineed the answer for all of these l don't understand any of this

The slope of a velocity time graph over any interval of time gives the during that interval

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k

Positrons are spontaneously emitted from the nuclei of