Find the slope for each problem and please hurry I need help

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

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