The cost of four scarves and six hats is 52.00 the cost is 1.00 more than the cost of one scarf. what is the cost of one scarf

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.