What’s the equation of a circle, center (1, -5), radius of 10

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

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?