Find the surface area of each composite figure. Round to the nearest tenth if necessary. Number 3,17

How to determine whether two known pairs of points are on the same line.

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)

Icould really use some with this question.