Equation 1: x - 3y = 9 equation 2: y = -3x + 3 what is the best description for the lines? a) parallel b)vertical c) perpendicular d) the same line

Find dy/dx using implicit differentiation ln(20+e^xy)=y

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

Witch represents the inverse of the function f(x)=1/4x-12