Which of the following equations has only one solution? x2 - 8x + 16 = 0 x(x - 1) = 8 x2 = 16

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

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?