Plz help me with this two question

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

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)

Which number line correctly shows 0.8 + 0.3?