Write an equation of the line that passes through (5,9) and is perpendicular to the line y=-1/3x+1

Can someone pls ! pls answer all. no explanation needed..

What expression is equivalent to (2x-1)(x-3)?

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21