PLEASE HELP WHAT WOULD THIS BE? IM CONFUSED

Use the distributive property to factor the expression. 15x + 6 a) 2 5 b) − 2 5 c) 3(5x + 2) d) 5(3x + 6)

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

Nielsen media research wants to estimate the mean amount of time (in minutes) that full- time college students spend watching television each weekday. find the sample size necessary to estimate the mean with a 15-minute margin of error. assume that a 95% confidence level is desired. also assume that the population standard deviation is known to be 112.2 minutes.