Find the length of AB 40 degrees 8m

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)

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Which one is true about the hexagons ?