Evaluate the expression: (10) -3x (-2) +5

What value of x is in the solution set of –5x – 15 > 10 + 20x?

Find the area of the regular hexagon if a side is 20 cm.

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days