私を助けてください私はあなたが方程式を解くことをお願いします

aka help me please i beg you solve the equations

Find the nonpermissible replacement for binthis expression.b2/5b +5

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.

Michael split a rope that was 28 inches long into 5 equal parts. brenden split a rope that was 30 inches long into 6 equal parts. which boy's rope was cut into longer pieces?