Marion has 4 cards, jake has 4 cards and sam has 3 cards. can you write a multiplication sentence to find out how man cards they have in all? explain your answer.

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.