Aline represented by y = 3x − 1 and a line perpendicular to it intersect at r(1, 2). what is the equation of the perpendicular line?

Does anyone know how to do geometryme with this problem

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Which pair of numbers is relatively prime? a. 105 and 128 b. 130 and 273 c. 205 and 350 d. 273 and 333