Problema Solution
A certain elevator has a capacity of 1000kg, suppose x children, each weighing 35kg, and y adults each weighing 75kg are on the elevator. write an inequality about the number of adults and children that can safely ride in the elevator
Answer provided by our tutors
x children weight: 35x kg
y adults weight: 75y
altogether they weight: 35x + 75y
the capacity of the elevator is 1000 kg which means that the together weight needs to be smaller than 1000 kg:
35x + 75y < 1000 divide both sides by 5
7x + 15y < 200 is the inequality about the number of adults and children that can safely ride in the elevator.