What's the perimeter of an obtuse triangle

yes i may be popular in school but i need & people don't be brats and delete my questions

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?

The longer leg of a 30-60-90 trangle is 18

Write an equation in slope-intercept form using the given points (19,-16), (-7,-15)