Y’all I need help, MATH, please correct answer and how you did it:)

What is the slope of a line that is perpendicular to y = 3x + 1

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Ataxi company charges $2.25 for the first mile and then $0.20 per mile for each additional mile, or f = $2.25 + $0.20(m - 1) where f is the fare and m is the number of miles. if juan's taxi fare was $6.05, how many miles did he travel in the taxi? if juan's taxi fare was 7.65, how many miles did he travel in taxi