Which division problem does the number line best illustrate

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

Can someone me and do the problem plz so i can understand it more better

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?