Can someone help me please this is due today!

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Can ground tissue do photosynthesis

Crystallization from cooling magma disvribe one way that a atoms bond b protons attract electronsc ions combine d minerals form