Twin brothers, person a and person b, can mow their grandparent's lawn together in 18 minutes. person a could mow the lawn by himself in 15 minutes less time than it would take person
b. how long would it take person b to mow the lawn by himself?

Over the course of a month, a person's weight decreases. what type of relationship is this? a. positive relationship

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.

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18