41/2 + 1 1/2 + 1 + 2 + 4= show me how you get the 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.

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.

If point a= (10,4) and b= (2,19) what is the length of ab 17 units 15 units 23 units 12 units