What does cross-sectional area mean in math term?

Solve the system by the elimination method. 3x - 2y - 7 = 0 5x + y - 3 = 0 to eliminate y, the lcm is 2. which of the following is the resulting equations? 1.3x - 2y - 7 = 0 5x + y - 3 = 0 2.3x - 2y - 7 = 0 -10x - 2y + 6 = 0 3.3x - 2y - 7 = 0 10x + 2y - 6 = 0

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?