Here is the screenshots for my question

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

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.