If ac=4x-16, cb=8x-18, and ab=50. find ac and cb

Which graph represents the solution of the inequality?

The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?

Each side length of the hexagons is 1, what’s the area of abc